Here is the recipe:
M&M Oatmeal Cookies
1/2 cup butter (at room temperature)
1/2 cup sugar
1/2 cup brown sugar
1 teaspoon vanilla
1 cup all-purpose flour
1/2 teaspoon baking soda
1 cup quick-cooking rolled oats
*1 cup M&M's
Heat oven to 350ºF.
Beat butter and sugars until creamy.
Add egg and vanille. Beat well.
Add flour and baking soda and mix well.
Finally add oats and M&M's. Mix well.
Drop dough by rounded teaspoonfuls onto ungreased baking sheet.
Bake 10 - 12 minutes until golden brown
Remove to wire rack and cool completely.
* M&M's can be substituted for chocolate chips.