Rolo Cookies

I am sure many of you have had these before...if not they are some of the best cookies ever!

1 cup butter
1 cup sugar
1 cup brown sugar
2 eggs
1 tsp. vanilla
3/4 cup cocoa
1 tsp. baking soda
2 1/2 cups flour
12 oz bag of rolos

Cream sugar and butter. Add eggs and vanilla. Mix well. Mix in dry ingredients. Refrigerate for 30 minutes. Cover rolo in just enough dough, so you don't see it anymore. Then roll ball in sugar. Bake at 375 degrees for 7 to 10 minutes.