Our simple gluten-free yellow sheet cake is an ideal birthday cake: a fluffy vanilla base with a moist, tender crumb and a plush chocolate buttercream you’ll adore.
This Fluffy Vanilla Sheet Cake Can Make Any Occasion Sweeter
Few combinations are as timeless as yellow vanilla cake with chocolate frosting. This gluten-free sheet cake captures that nostalgic flavor: a buttery, light vanilla cake topped with a rich chocolate buttercream.
🥣 Easy to Make: The recipe uses straightforward ingredients and simple techniques. No advanced decorating skills required—perfect for a last-minute celebration.
🍰 Flavor Profile: The cake is tender and buttery with a pronounced vanilla note, while the chocolate buttercream adds a silky, fudgy finish.
🧈 Pro Tip: Use room-temperature eggs, butter, milk, and sour cream. Bringing ingredients to temperature ahead of time improves texture and helps the batter come together smoothly.
Happy baking! xo, Emily
Gather Your Ingredients
Homemade cakes are easier than they look—especially sheet cakes. Here are the main ingredients you’ll need for the cake and the frosting.
- Gluten-Free Flour. Use a reliable 1:1 measure-for-measure gluten-free blend (one with xanthan gum if not already included). Weighing flour gives the best results, or use the spoon-and-level method to avoid packing.
- Cornstarch. A small amount lightens the texture, approximating cake flour for a tender crumb.
- Baking Powder. Provides lift for a soft, fluffy cake.
- Salt. Balances and enhances the flavors.
- Softened Butter. The creaming method uses butter for structure, moisture, and that classic buttery flavor.
- Sugar. Granulated sugar keeps the cake light in color and sweet just right.
- Eggs. Whole eggs make this recipe simple while keeping the cake moist.
- Vanilla Extract. A full tablespoon helps punch up the vanilla character; vanilla bean paste is a nice swap for flecked cake.
- Sour Cream. Adds moisture and acidity, improving rise and texture—one of the secret keys to a tender cake.
- Whole Milk. Use whole milk for the best texture; lower-fat milks can produce a drier result.
- Chocolate Frosting. A simple buttercream made from butter, powdered sugar, unsweetened cocoa, vanilla, salt, and cream or milk makes the perfect complement.
How To Make Yellow Sheet Cake With Chocolate Frosting, Step By Step
The full recipe, with exact ingredient amounts and timing, is available in the recipe card below.
First, Bake The Cake
- Set Out Ingredients In Advance. Bring eggs, butter, milk, and sour cream to room temperature (about 1–1.5 hours). This ensures smooth creaming and an even batter.
- Preheat & Prep. Preheat the oven to 350°F. Grease a metal 9×13-inch pan or line it with parchment and set aside.
- Combine Dry Ingredients. Whisk together the gluten-free flour blend, cornstarch, baking powder, and salt in a medium bowl.
- Cream Butter and Sugar. Beat room-temperature butter and sugar in a stand mixer with the paddle attachment on medium-high for 2–3 minutes until light and fluffy.
- Add Eggs and Vanilla. Scrape the bowl, then add eggs one at a time, mixing after each, followed by the vanilla.
- Mix in Sour Cream. Scrape the bowl again and add the sour cream on low speed until incorporated.
- Alternate Dry Ingredients and Milk. With the mixer on low, add half the dry mixture, then half the milk, then the remaining dry and milk. Mix only until just combined—finish with a spatula if needed to avoid over-mixing.
- Transfer to Pan. Pour the batter into the prepared pan and smooth the top with an offset spatula.
- Bake. Bake 35–40 minutes, or until the cake springs back lightly and a tester shows a few moist crumbs.
- Cool Completely Before Frosting. Cool the cake at least 15 minutes in the pan, then remove to a wire rack and cool completely before applying frosting to prevent melting.
Then, Make The Frosting & Decorate The Cake
- Beat the Butter. In a large bowl, beat softened butter on low for about 2 minutes until light and fluffy.
- Add Dry Ingredients and Cream. Add powdered sugar, cocoa powder, salt, and vanilla, then add the cream. Mix 30 seconds on low, then about 1 minute on medium until smooth.
- Adjust Consistency. If the frosting is too thick, add a little more cream; if too thin, add powdered sugar or cocoa powder a teaspoon at a time. The frosting should spread easily but hold shape. For a glossy finish, stir in 1–2 tablespoons corn syrup (optional).
- Frost the Cake. Pipe the frosting with a bag and tip or spread it with an offset spatula. A subtle swirl with the spatula looks pretty; add sprinkles if desired.
- Serve and Store. Slice with a sharp knife and serve. Store covered in the refrigerator for 2–3 days (bring to room temperature 30 minutes before serving), or freeze slices up to 2 months.
FAQ + Tricks For The Best Yellow Sheet Cake
Weigh ingredients when possible. Accurate measurements are especially important for gluten-free baking. A digital kitchen scale is the most reliable method; otherwise use the spoon-and-level technique.
Use room-temperature ingredients. Cold ingredients can make the batter lumpy and affect rise. Allow butter, eggs, sour cream, and milk to sit out for about an hour.
Decorating tips. For a quick finish, smooth frosting with an offset spatula. For a more polished look, pipe borders or rosettes with a closed-star tip.
Your pan matters. A light-colored metal 9×13 pan conducts heat evenly and yields a flat, evenly baked sheet cake. If you use glass or ceramic, add a few extra minutes to the bake time and watch for doneness.
More Gluten-Free Cake Recipes To Celebrate With
Gluten-Free Carrot Cake
Gluten-Free Texas Chocolate Sheet Cake
Gluten-Free Tres Leches Cake
Gluten-Free Yellow Layer Cake
🌟 Did You Make This Recipe?
Leave a star rating and share your experience—I’d love to hear how your gluten-free yellow sheet cake turned out!
Gluten-Free Yellow Sheet Cake With Chocolate Frosting
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Equipment
- Metal 9×13 Pan
- Offset Spatula
- Stand Mixer or Hand Mixer
Ingredients
For The Yellow Cake:
- 2 cups gluten-free measure-for-measure flour (240 g)
- 1/4 cup cornstarch (32 g)
- 2 1/4 tsp baking powder
- 1/2 tsp kosher salt
- 1 cup butter, softened (227 g / 2 sticks)
- 1 3/4 cups granulated sugar (350 g)
- 3 large eggs, room temperature
- 1 Tablespoon vanilla extract
- 1/8 tsp almond extract (optional)
- 1/2 cup sour cream, room temperature
- 1 cup whole milk, room temperature
For The Chocolate Frosting:
- 1 cup butter, softened (227 g / 2 sticks)
- 3 1/2 cups powdered sugar (420 g), or more as needed
- 3/4 cup unsweetened cocoa powder (65 g) — use natural cocoa
- 1 1/2 tsp vanilla extract
- 1/4 tsp kosher salt
- 1/3 cup heavy cream, or more if needed
- 1 Tbsp corn syrup (optional, for gloss)
Instructions
First, Make The Cake:
- Set Out Ingredients: Bring cold ingredients to room temperature (about 1–1.5 hours).
- Preheat & Prep: Preheat oven to 350°F. Grease a metal 9×13 pan or line with parchment.
- Combine Dry: Whisk flour blend, cornstarch, baking powder, and salt.
- Cream Butter & Sugar: Beat butter and sugar 2–3 minutes until light and fluffy.
- Add Eggs & Vanilla: Add eggs one at a time, then vanilla, scraping the bowl as needed.
- Mix in Sour Cream: Add sour cream on low speed until incorporated.
- Alternate Dry & Milk: Add half the dry ingredients and half the milk, then the remainder, mixing just until combined.
- Pour & Smooth: Pour batter into pan and smooth the top.
- Bake: Bake 35–40 minutes, until a tester comes out clean with a few moist crumbs.
- Cool: Cool in the pan 15 minutes, then transfer to a rack and cool completely before frosting.
Then, Make The Frosting & Decorate:
- Beat Butter: Beat softened butter on low until light and fluffy, about 2 minutes.
- Add Dry Ingredients & Cream: Add powdered sugar, cocoa, salt, and vanilla. Add cream and mix until smooth.
- Tweak Consistency: Add cream to thin or powdered sugar/cocoa to thicken. Add corn syrup for shine if desired.
- Frost: Frost the cooled cake with an offset spatula or pipe as preferred. Decorate with sprinkles if you like.
- Store: Refrigerate covered for 2–3 days or freeze up to 2 months. Bring to room temperature before serving.
Notes
- Gluten-Free Flour: Use a dependable measure-for-measure blend. If your chosen blend doesn’t contain xanthan gum, add it according to package directions. Weigh flour for accuracy or use spoon-and-level to measure.
- Room Temperature Ingredients: Bring cold ingredients to room temperature to avoid a lumpy batter and uneven bake.
- Frosting Tips: An offset spatula provides a clean, simple finish. For decorative piping, choose a closed-star or round tip to create borders or rosettes.
- Pan Choice: A light-colored metal pan works best for even baking and a flat surface; glass or ceramic may require additional bake time.
Video
Find the recipe:
sweetsandthankyou.com/yellow-sheet-cake/