Crock Pot Hot Fudge Sundae Cake

1 c. sugar
¼ c. cocoa

4 t. baking powder
1 t. salt
1 c. milk
¼ c. butter, melted
1 t. vanilla
1 ½ c. brown sugar
½ c. cocoa
3 c. hot water

Spray inside of a large slow cooker (halve recipe for smaller cooker) with cooking spray. In a bowl, mix flour, sugar, ¼ c. cocoa, baking powder, and salt. Stir in milk, butter, and vanilla. Spread batter evenly in slow cooker. In same bowl, mix brown sugar and ½ c. cocoa. Stir in hot water. Pour evenly over batter in slow cooker. Cover and cook on high 1 ½ hours or until toothpick inserted into cake part comes out clean. Turn off slow cooker and allow cake to cool, uncovered for 30 – 40 minutes. Spoon warm cake into dishes and spoon sauce on top. Serve with whipped cream, Cool Whip, or ice cream.