White Texas Sheet Cake is made in a saucepan just like classic chocolate Texas sheet cake, but flavored with vanilla and almond so it tastes like wedding cake. Buttery, homemade, and topped with smooth white icing — it feeds a crowd with very little effort. It is ready to eat in an hour or two, no softening butter ahead of time required.
Preheat the oven to 375°F and grease a 13x18x1-inch half sheet or jelly roll pan
Bring 1 cup salted butter and 1 cup water to a boil in a large saucepan.
Remove from heat and stir in 2 cups granulated sugar until it's dissolved.
Add 2 cups all purpose flour, 2 large eggs, ½ cup sour cream, 1 teaspoon almond extract, 1 teaspoon vanilla extract, 1 teaspoon baking soda, and ½ teaspoon salt. Stir until a uniform batter is formed.
Pour into prepared pan and bake for 18-22 minutes.
Cool for about 10 minutes.
Icing
While cake is cooling, bring ½ cup salted butter and ⅓ cup milk to a simmer in a large saucepan.
When the butter is melted and the mixture starts to bubble, remove from heat and whisk in 4½ cups powdered sugar, ½ teaspoon almond extract, and 1 teaspoon vanilla extract.
Spread warm frosting over warm cake with an offset spatula. Top with sprinkles if desired. Let cool completely before serving.