Heat over to 350 degrees.

CAKE MIX:

3 c. Bisquick baking mix
1 c. sugar
1 1/2 c. sour cream
1/4 c. butter, softened
1 1/2 tsp. vanilla
2 eggs

STREUSEL FILLING:

1/4 c. packed brown sugar
1/4 c. finely chopped nuts
1 tsp. cinnamon

Grease and flour 12 cup bundt cake pan. Prepare streusel filling and reserve. Mix remaining ingredients and beat 1 minute. Spread 1/3 of the batter (about 1 1/4 cups) in pan and sprinkle with 1/2 of the streusel filling (about 1/4 cups). Repeat. Spread with remaining batter. Bake 45 to 50 minutes or until toothpick inserted in center comes out clean. Cool 10 minutes and remove from pan. Drizzle with glaze.

GLAZE:

1/4 c. butter
2 c. powdered sugar
1 tsp. vanilla
1 or 2 tsp. milk

Heat butter in 1 1/2 quart saucepan until melted. Stir in powdered sugar and vanilla. Stir in milk, 1 teaspoon at a time until smooth. Drizzle on cake.