Coca-Cola Brownie Cake

1 3/4 cups granulated sugar
2 1/2 cups sifted all-purpose flour
1/2 cup (1 stick) butter or margarine
1/2 cup vegetable oil
1 teaspoon baking soda
3 tablespoon cocoa
2 eggs
1/2 cup buttermilk
1 teaspoon vanilla extract
1/2 cup Coca-Cola

Brownie Frosting
3 cups confectioners' sugar
1/4 cup butter or margarine
3 tablespoons cocoa
1/3 cup Coca-Cola
1/2 teaspoon vanilla extract
3/4 cup chopped pecans

Combine all ingredients except vanilla extract and Coca-Cola. Blend at low speed of mixer, then beat 2 minutes at medium speed. Add vanilla extract, blending in well by hand. Add Coca-Cola and blend well by hand. Pour into greased tube pan. Bake at 350 degrees F for 50 minutes.

Cool and turn onto cake rack. While cake is still warm to touch, top with Brownie Frosting.

Frosting: Combine sugar, butter, cocoa, Coca-Cola and vanilla extract in small bowl. Beat until smooth. Stir in chopped pecans. Spread on warm cake. (May need to return cake to oven to warm after turning out on rack.)