Gluten-Free Texas Sheet Cake Recipe: Moist Chocolate Sheet Cake

Get ready for an incredibly moist and delicious chocolate cake. If you need a reliable dessert to bring to potlucks, coffee with friends, or just to enjoy at home, this Gluten-free Texas Sheet Cake delivers. It’s rich, chocolatey, and so tender that most people won’t believe it’s gluten-free.

A classic Texas sheet cake has a thin layer of chocolate cake that’s neither overly sweet nor dense, finished with a glossy chocolate glaze that nearly everyone swoons over. One of the best things about this version is that it stays fresh for days when stored properly—an impressive feat for gluten-free baking.

This recipe is quick and easy to prepare, portable, and a true crowd-pleaser. It can be eaten with or without plates and forks, making it perfect for gatherings. Chocolate cake with chocolate frosting rarely disappoints, and this Texas sheet cake is a favorite for its dependable texture and deep chocolate flavor.

Ingredients Needed for this Cake

All the ingredients are pantry staples, so this recipe is ideal for last-minute guests or an unexpected potluck.

• Pamela’s Gluten-free All-purpose Flour (or another all-purpose gluten-free mix with a binder such as xanthan gum). I also tested this with Namaste Perfect Flour Blend with equally good results.
• Buttermilk — use regular buttermilk or make a substitute by adding 1 teaspoon lemon juice or vinegar to a measuring cup and filling to 1/4 cup with milk.
• Cocoa Powder — dutch-processed works well, but any good cocoa will do.
• Cinnamon — just a touch adds depth of flavor.

The baking science behind Texas Sheet Cakes

Two key technique choices give this cake its ideal texture and flavor.

1. The batter is made using a method similar to reverse creaming: the dry ingredients (including the sugars) are combined with the fat first, and the wet ingredients are added last. This approach often yields a finer, more even crumb and a velvety texture compared with the traditional creaming method.
2. Blooming the cocoa powder enhances color and cocoa flavor. To bloom cocoa, whisk it with warm butter and a bit of water over low heat until it dissolves. This quick step yields a darker, richer chocolate taste.

I tested versions with and without cocoa blooming and with both creaming methods. The combination of reverse creaming and bloomed cocoa produced a darker color, bolder chocolate flavor, and a sturdy, pleasant texture.

Making the Cake

Step 1: Whisk the dry ingredients together in a large bowl.

Step 2: In a small saucepan, combine butter, water, and cocoa powder. Whisk over low heat until the cocoa dissolves, then drizzle the mixture into the dry ingredients and mix until just combined.

Step 3: Whisk together the buttermilk, eggs, and vanilla, then drizzle the wet mixture into the batter and mix just until combined. Scrape the bowl as needed and avoid overmixing.

Step 4: Pour the batter into a greased 9×13-inch or 10×15-inch rimmed sheet pan and bake.

Step 5: As soon as the cake comes out of the oven, make the icing. Melt butter in a saucepan, whisk in cocoa, milk, and vanilla, then gradually whisk in powdered sugar over low heat until smooth and combined.

Step 6: While the cake is still warm (about 5–10 minutes after baking), pour the icing over the top and quickly spread it into an even layer. Allow the cake to cool completely before slicing.

FAQ & Helpful Tips

• Does this cake need refrigeration? No. You can refrigerate it to speed up setting the icing, but I recommend keeping it tightly wrapped at room temperature for best texture.
• How long will it last? When tightly wrapped, this cake stays moist and fresh for at least 4 days at room temperature — exceptional for gluten-free baked goods.
• What pan should I use? Use a short-rimmed 9×13-inch or 10×15-inch pan for this recipe. To make a traditional large Texas sheet cake, double the recipe and bake in a 13×18-inch or 12×17-inch pan.
• Why might the icing crack? The icing sets quickly, so work fast when spreading it. Movement after setting can cause cracks; this is normal and won’t affect the taste.

If you enjoyed this cake, you might also like other potluck-friendly gluten-free desserts that are easy to serve and satisfying to share.

Recipe