A rolled cake looks like a dare.
You bake a sheet of sponge thinner than a pancake, then ask it to bend into a spiral without splitting down the middle.
I put off making one for about four years because I was certain mine would come out looking like a landslide.
Then a friend who bakes for a living watched me hesitate and told me the whole thing hinges on one detail: you roll it while it's hot.
Not warm. Hot, straight out of the oven, into a towel dusted with powdered sugar.
The sponge sets in that curled shape while it cools, so when you unroll it to fill it, it already knows what you want.
My first one came out perfect, which honestly annoyed me a little after all that worrying.
Now I make this every October and again the week of Thanksgiving.
The sponge is soft, cinnamon-heavy, and orange from the sweet potato puree.
The filling is cream cheese whipped with butter and powdered sugar until it's light enough to spread with the back of a spoon.
Sliced, it shows a clean spiral every single time.
If you can spread batter on a sheet pan, you can make this one.
Ingredients You'll Need
This is a short list, and almost all of it is already in your pantry. The only thing worth planning for is the sweet potato puree, which you can roast yourself or pull from a can.
For the Sponge
- Nonstick spray and parchment. Both, not one or the other. The parchment is what lets you lift the whole hot sheet of cake out in one piece, and the spray keeps the parchment from grabbing the edges.
- All-purpose flour (¾ cup). That's it. A roll cake needs a thin, flexible sponge, and more flour means a stiffer cake that fights the curl.
- Baking powder (1 teaspoon) and salt (½ teaspoon). The lift comes mostly from the beaten eggs, but the baking powder keeps the crumb from going dense.
- Cinnamon (1 ½ teaspoons), allspice (¼ teaspoon), nutmeg (¼ teaspoon). Cinnamon leads, the other two fill in behind it. Sweet potato is mild, so it needs the spice more than pumpkin does.
- Eggs (3 large, room temperature). Cold eggs will not whip to the volume you need. Set them on the counter 30 minutes ahead, or drop them in warm water for 5 minutes.
- Granulated sugar (¾ cup) plus brown sugar (¼ cup). The brown sugar adds a little molasses depth and keeps the sponge moist. Skipping it gives you a paler, plainer cake.
- Sweet potato puree (⅔ cup). Roasted and mashed smooth is best for flavor. Canned works and saves you an hour.
- Powdered sugar. For dusting the towel and finishing the roll. Do not skip the towel dusting, it is the entire anti-stick strategy.
For the Cream Cheese Filling
- Cream cheese (8 oz, full fat, room temperature). Full-fat block cream cheese, not the tub kind. The whipped tub stuff has too much water and the filling goes runny.
- Unsalted butter (4 tablespoons, softened). Butter is what keeps the filling stable once the roll goes back in the fridge.
- Powdered sugar (1 cup). Sweetens without the grit you'd get from granulated.
- Vanilla extract (1 teaspoon). Real extract. It's one teaspoon in a filling with almost nothing to hide behind.
How to Make Sweet Potato Roll Cake
Read the whole method once before you start. The rolling step happens fast and you don't want to be hunting for a clean towel with a hot sheet pan in your hands.
Step 1: Prep the Pan and the Towel
Heat the oven to 375°F.
Line a 10x15-inch rimmed sheet pan with parchment, then spray the parchment lightly.
Lay a clean, thin kitchen towel on the counter and dust it heavily with powdered sugar. Not a light sprinkle. A real, even coat.
Step 2: Whisk the Dry Ingredients
Whisk the flour, baking powder, salt, cinnamon, allspice, and nutmeg together in a small bowl.
Set it right next to the mixer so you're not walking anywhere later.
Step 3: Beat the Eggs and Sugars
Beat the eggs with both sugars on high for a full 4 to 5 minutes, until the mixture is pale, thick, and falls off the beater in a ribbon.
This is the only real leavening in the cake, so don't cut it short.
Beat in the sweet potato puree on low just until the color goes even.
Step 4: Fold in the Dry Ingredients
Add the dry ingredients and fold them in by hand with a spatula.
Stop the second the flour disappears. Overmixing here knocks the air out and gives you a tough sponge that cracks.
Step 5: Spread and Bake
Pour the batter onto the sheet pan and spread it into an even layer all the way to the corners.
An offset spatula makes this easy, but the back of a spoon works fine.
Bake 12 to 15 minutes, until the top springs back when you press it lightly.
Fair warning: an overbaked sponge is a cracked sponge. Check it at 12 minutes.
Step 6: Roll It Hot
Run a knife around the edges, then flip the pan onto the sugared towel and peel off the parchment.
Starting from a short end, roll the cake and the towel up together into a log.
Leave it rolled on a rack until it's completely cool, about 1 hour.
The No-Crack Rolling Trick
Every cracked roll cake I've seen came from waiting too long. A hot sponge is flexible because the starch hasn't set yet. Ten minutes later it's a different material entirely.
- Roll within 60 seconds of the pan leaving the oven. Have the towel dusted and waiting before you even open the oven door.
- Dust the towel heavily. Powdered sugar is what stands between the sponge and a towel that welds itself to your cake. Use more than feels reasonable.
- Use a thin towel, not terrycloth. A flour sack towel or a smooth dish towel releases cleanly. Terry loops leave a waffle print in the surface.
- Roll from the SHORT end. You get a fatter spiral with fewer turns, which means less stress on the sponge and prettier slices.
- Cool it fully rolled. This is the part people rush. If you unroll a warm cake, it relaxes flat and cracks when you re-roll it. One full hour, no shortcuts.
Sound fussy? It really isn't, it's just fast.
Cream Cheese Filling
The filling takes about three minutes and it's hard to get wrong. The one rule is that both the cream cheese and the butter have to be genuinely soft.
Beat the cream cheese and butter together until completely smooth with no lumps.
Add the powdered sugar and vanilla, then beat on medium for 2 minutes until it's light and spreadable.
Unroll the cooled cake gently. It will hold a slight curl, and that's exactly what you want.
Spread the filling to within ½ inch of the edges. Go all the way to the sides and you'll squeeze filling out the ends when you re-roll.
Re-roll the cake without the towel this time, wrap it in plastic, and chill for at least 1 hour before slicing.
Pro tip: chilling is what gives you clean slices. A room-temperature roll smears.
Tips for Success
- Room-temperature eggs whip higher. Cold eggs top out at maybe half the volume, and volume is structure in a sponge this thin.
- Weigh or measure the puree carefully. Too much and the sponge turns gummy and refuses to set. ⅔ cup is the number.
- Drain watery puree. If your roasted sweet potato looks wet, press it in a strainer for a few minutes. Extra moisture is the enemy here.
- Trim the ends before serving. The first half inch on each end is always a little ragged. Slice it off, eat it standing at the counter, tell nobody.
- Wipe the knife between slices. A hot, dry knife gives you those clean bakery-looking spirals.
- Don't grease-and-flour instead of using parchment. A thin sponge will tear when you try to flip it. Parchment is non-negotiable.
Storing and Freezing
- Refrigerator. Wrapped tightly in plastic, the filled roll keeps up to 4 days. The sponge actually gets a little more tender on day two.
- Freezer, whole. Wrap in plastic, then foil, and freeze up to 2 months. Thaw overnight in the fridge, still wrapped, then dust with fresh powdered sugar.
- Freezer, sliced. Freeze slices on a tray until firm, then bag them. A single slice thaws on the counter in about 30 minutes.
- Make-ahead plan. You can bake and roll the sponge in the towel a day early. Keep it wrapped at room temperature, then fill and chill the next day.
- Dust last. Powdered sugar dissolves into the surface in the fridge, so add the finishing dust right before it goes to the table.
Frequently Asked Questions
Why did my cake roll crack when I rolled it?
Almost always one of two things: the cake cooled too much before the first roll, or it was overbaked. Roll it within a minute of leaving the oven and pull it at 12 to 15 minutes, when the top just springs back. A few hairline cracks on the outside are normal and a dusting of powdered sugar hides them completely.
Can I use canned sweet potato puree instead of fresh?
Yes, and I do it often. Use plain canned sweet potato puree, not the candied yams packed in syrup. If it looks loose in the can, press it in a fine strainer for a few minutes so the sponge isn't fighting extra water.
How do I roll the cake without the towel sticking to it?
Dust the towel with powdered sugar far more heavily than you think you need to, and use a thin, smooth towel rather than terrycloth. The sugar melts into a barrier layer on the hot sponge and the towel peels away clean.
Can I make this ahead and freeze it?
Absolutely. Fill and chill the roll, then double wrap it and freeze up to 2 months. Thaw it overnight in the refrigerator while it's still wrapped, which keeps condensation off the surface, then dust it fresh before serving.
How long does sweet potato roll cake keep in the fridge?
Four days, wrapped tightly. Cream cheese filling means this one lives in the refrigerator, not on the counter. Let slices sit out for 10 minutes before eating so the filling softens.
Can I use pumpkin puree instead?
You can, one for one. Pumpkin is a bit wetter and a bit less sweet, so I add an extra 2 tablespoons of flour and a pinch more cinnamon. The sweet potato version has a rounder, mellower flavor, which is the whole reason I make it this way.
Recipe
Spiced Sweet Potato Roll Cake
Ingredients
For the Sponge
- nonstick spray for the pan
- ¾ cup all-purpose flour
- 1 teaspoon baking powder
- ½ teaspoon salt
- 1 ½ teaspoons ground cinnamon
- ¼ teaspoon ground allspice
- ¼ teaspoon ground nutmeg
- 3 large eggs room temperature
- ¾ cup granulated sugar
- ¼ cup brown sugar packed
- ⅔ cup sweet potato puree roasted and mashed, or canned
- powdered sugar for the towel and dusting
For the Cream Cheese Filling
- 8 oz cream cheese full fat, room temperature
- 4 tablespoons unsalted butter softened
- 1 cup powdered sugar
- 1 teaspoon vanilla extract
Instructions
Make and Roll the Sponge
- Heat the oven to 375F. Line a 10x15-inch rimmed sheet pan with parchment and spray the parchment lightly. Lay a thin kitchen towel on the counter and dust it heavily and evenly with powdered sugar.
- Whisk the flour, baking powder, salt, cinnamon, allspice, and nutmeg together in a small bowl.
- Beat the eggs with the granulated and brown sugars on high for 4 to 5 minutes, until pale, thick, and falling from the beater in a ribbon. Beat in the sweet potato puree on low just until the color is even.
- Fold in the dry ingredients by hand with a spatula, stopping as soon as the flour disappears.
- Spread the batter evenly to the corners of the sheet pan. Bake 12 to 15 minutes, until the top springs back to a light press.
- Run a knife around the edges, flip the hot cake onto the sugared towel, and peel off the parchment. Roll the cake and towel together from a short end and cool completely on a rack, about 1 hour.
Fill and Chill
- Beat the cream cheese and butter until completely smooth. Add the powdered sugar and vanilla and beat on medium 2 minutes, until light and spreadable.
- Unroll the cooled cake gently and spread the filling to within ½ inch of the edges.
- Re-roll the cake without the towel, wrap in plastic, and chill at least 1 hour. Trim the ends, dust with powdered sugar, and slice with a hot, dry knife.
Notes
- Roll it hot: the first roll must happen within a minute of the pan leaving the oven, while the sponge is still flexible.
- Do not overbake: check at 12 minutes. An overbaked sponge cracks no matter how fast you roll it.
- Drain wet puree: press loose sweet potato puree in a strainer for a few minutes so the sponge sets properly.
- Storage: refrigerate wrapped up to 4 days, or freeze up to 2 months and thaw overnight in the fridge.
