Ingredients
For the cake
2 cups sugar
2 cups flour, plus 1 tablespoon divided
1 teaspoon baking powder
2 teaspoon baking soda, divided
1/2 pound unsalted butter
1/4 cup sweetened cocoa powder
1 cup water
2 eggs
1/2 teaspoon kosher salt
1/2 cup milk
1/2 tablespoon vinegar
1 teaspoon vanilla extract
1 1/2 cups semi sweet chocolate chips
Preheat oven to 375 degrees. Prepare a 9×12 cake pan by buttering and flouring. Set aside.
1. In a small cup add 1/2 cup milk and 1/2 tablespoon vinegar. Set aside.
2. In a medium sized bowl combine 2 cups flour, sugar, salt, 1 teaspoon baking soda, and baking powder, stir with a whisk to combine. Set aside.
3. In a small saucepan combine butter, cocoa and water. Bring to a boil, then add to flour mixture. Beat well.
4. Add 1 teaspoon of baking soda to milk mixture. Set aside. In a small bowl combine chocolate chips and 1 tablespoon of flour. Set aside.
5. Add eggs to flour butter mixture. Then add milk mixture and vanilla. Beat well to combine. Add chocolate chips to mixture and fold in.
6. Pour into prepared cake pan. Bake for 20 minutes or until a toothpick comes out of the center clean.
5 minutes before cake is done, prepare icing.
For icing
1/4 cup sweetened cocoa powder
1/4 pound unsalted butter
6 tablespoons milk
1 pound powdered sugar
1 teaspoon vanilla extract
1/4 teaspoon salt
Bring cocoa, butter and milk to a boil in a large saucepan. Remove from heat and add powdered sugar, salt and vanilla, beat well with mixer. Spread over hot cake. Serve!