Double Chocolate Muffins

Ingredients:
1 C. cocoa
3 1/2 C. flour
2 tsp. soda
1/2 tsp. salt
1 1/2 C. buttermilk or milk soured with 1 tbs. vinegar
1/2 C. sour cream
2 tsp. vanilla
1 C. butter
2 C. packed brown sugar
2 eggs
3 tbs. oil
Chocolate chips

Directions:
Preheat oven to 350 degrees. Grease muffin pans. Cream butter, sugar and eggs. Mix dry ingredients in separate bowel. In another bowel, mix buttermilk, sour cream, vanilla, and oil. Add alternately with drying ingredients to creamed mixture. Add chocolate chips. Bake 25-30 minutes.