Preheat oven to 350 degrees. Grease 9 x 13” pan.
Beat the following together on low speed for 30 seconds, scraping bowl constantly: Bisquick, sugar, egg, milk or water, butter or shortening, vanilla.
Then beat the mixture on medium speed for 4 minutes, scraping occasionally. Pour into prepared pan. Bake 40 minutes or until a toothpick inserted comes out clean. Cool slightly. Preheat the oven to “broil.”
Mix topping ingredients together and spread on the cake. Broil 3” from heat for 3 minutes or until the top is golden brown and bubbly.
High altitude instructions for the Denver contingent:
Bake at 375 degrees.
Bake for 35 minutes or a little more.