Step 1

Preheat oven to 375 degrees. Prepare a 9x12 cake pan by buttering and flouring. Set aside.

Step 2

In a small cup add 1/2 cup milk and 1/2 tablespoon vinegar. Set aside.

Step 3

In a medium sized bowl combine 2 cups flour, sugar, 1 teaspoon baking soda, salt and baking powder, stir with a whisk to combine. Set aside.

Step 4

In a small saucepan combine butter, cocoa and water. Bring to a boil, then add to flour mixture. Beat well.

Step 5

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.

Step 6

Add eggs to flour butter mixture. Then add milk mixture and vanilla. Beat well to combine. Add chocolate chips to mixture and fold in.

Step 7

Pour into prepared cake pan. Bake for 20 minutes or until a toothpick comes out of the center clean.

Step 8

5 minutes before cake is done, prepare icing.

Step 9

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!