Got this recipe from the back of a bag of M&M's Mini Baking Bits.
2 sticks unsalted butter
1/2 cup sugar
1/2 cup firmly packed brown sugar
1 large egg
1 tsp vanilla extract
2 cups all purpose flour
1/2 tsp baking soda
1/8 tsp salt
1 bag of M&M's mini baking bits
3/4 cup chopped nuts (optional)
Preheat oven to 350.
In a bowl, cream butter and sugars until light and fluffy; beat in egg and vanilla.
In a medium bowl, combine flour, baking soda and salt; blend into creamed mixture. Stir in M&M's baking bits and nuts.
Drop by heaping tablespoons and about 2 inches apart onto an ungreased cookie sheet. Bake 10-13 minutes or until edges are lightly browned and centers are still soft.
Do not overbake!
Cool one minute on the cookie sheet; cool completely on wire racks. Store in tightly covered container.