This recipe was posted by Imzadi almost a year ago:
Upside Down Chocolate Pudding Cake
1 cup Bisquick
1 cup sugar
1/3 cup and 3 Tbsp. unsweetened cocoa
1/2 cup milk
1 tsp. vanilla
1 2/3 cup hot tap water
Mix bisquick, 1/2 cup sugar, 3 Tbsp. cocoa, milk and vanilla. Spoon batter evenly into lightly greased crockpot. Mix remaining sugar, cocoa and hot tap water. Pour over the batter that is already in the crockpot. Cook on high 2 1/2 hours or until batter no longer looks shiny on top.
*Note:* This ends up looking like a cake from the top, but when you slice (scoop) the cake, there is a layer of pudding underneath it. Very rich! Serve warm
Here is the thread it was on -- if you want to see all the comments.