We have been making this cake in our house since I was a teenager. I think it became popular around that time and named as it is after it was printed in a newspaper in Texas. As all great recipes go it was passed around over and over. This cake always reminded me of lunch lady brownies. Those caky brownies that were covered with a fluffy chocolate icing. It was also very similar to a cake my Mamaw would make. She would ice it before it had time to cool and the icing melted into the whole cake. Her cake was usually just a box mix made special with the use of homemade icing.



What sets a Texas sheet cake apart from other cakes is the texture and mild cake with a rich icing. The cake itself isn’t extremely sweet, because the icing makes up for all the missing sweetness. The cake is also really moist. This comes from the addition of the sour cream. Another key to making this cake is blooming the cocoa in the water and melted butter. Cocoa needs that extra step in order to fully absorb the liquids and unlock its full flavor profile. Now the icing is a simple basic chocolate icing. There really isn’t much to it. No additional melted chocolate, cream, or gelatin just simple sugar, cocoa, butter, and milk. That icing has been made in homes for decades to cover all kinds of cakes. However, what makes it a Texas sheet cake is the step of icing while the cake is warm and allowing the icing to melt.



It then melts into the top layer of the cake locking in all the moisture and gets a slightly crackle texture on top. I use this icing anytime I need a basic chocolate flavor. It is the best multipurpose chocolate icing! The last thing that makes this cake a Texas sheet cake is of course the pan it is cooked in. A sheet pan, also known as a jelly roll pan is simply an American cookie sheet that has a 1-inch-deep side instead of just a flat surface. Most cookie sheet these days are that standard commercial jelly roll pan, but I do remember my mom having some cookie sheets without the edges. Even though it is cooked in that sheet pan you don’t have to do it all the time.

I do sometimes cook this in round cake pans. You just need to be sure the pan has enough edge to hold the cake and the icing when finished. If you like the texture of this cake but prefer something that isn’t chocolate, try making flavor changes. You could always leave out the cocoa and add lemon or vanilla. Enjoy!

Texas Sheet Cake
Method
- Combine sugar, flour, baking soda, and salt in a large bowl. Stir in sour cream and beaten eggs. Melt butter in a heavy saucepan over medium heat. Whisk in 1 cup water and cocoa. Bring to a boil, whisking constantly. Remove from heat and stir into flour mixture. Pour batter into a lightly greased 15×10 inch jelly roll pan. Bake at 350'F for 20 to 25 minutes or until a wooden pick inserted in center of cake comes out clean. While cake is cooking make fudge icing.
- Melt butter in a saucepan over medium heat. Whisk in milk and cocoa. Remove from heat. Gradually add powdered sugar, stirring until smooth. Stir in vanilla extract, then spread fudge frosting evenly over warm cake. (I often skip the melting part and just beat soft butter, milk, vanilla, and dry ingredients together with a mixer until fluffy then spread over warm cake.)



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