
A velvety, tender, perfectly chocolate Texas sheet cake made from a tried-and-true family recipe perfect for entertaining or just because!
Grease a 10x15 baking pan (or spray with cooking spray) and preheat oven to 350 degrees. See notes below regarding other pan sizes.
Combine flour, sugar, baking soda and salt in a large mixing bowl. Whisk to incorporate ingredients then set aside.
Melt butter in a small saucepan then whisk in cocoa powder and water or black coffee until smooth. Stir and heat over medium-high heat until boiling. Remove from heat.
Combine buttermilk, eggs and vanilla extract in a small bowl then mix well and set aside.
Pour hot cocoa power mixture into bowl with flour mixture then stir to incorporate. Add buttermilk mixture then whisk all ingredients together for one minute.
Pour batter into prepared pan then bake for 20-22 minutes or until toothpick inserted in the middle of the cake comes out clean. Remove from oven then prepare icing.
Combine milk, butter and salt in a small saucepan then heat until simmering. Remove from heat then stir in vanilla extract.
Meanwhile, sift together powdered sugar and cocoa into a large mixing bowl (the sifting is optional but it prevents lumps). Pour hot milk/butter mixture into bowl with powdered sugar and cocoa powder then stir until smooth.
Pour icing over warm cake. Let cake rest for a few hours before serving to ensure the icing sets up some before cutting the cake.
Once the cake is cool, cover then store at room temperature.