Preheat your oven to 375 degrees F.
You will need a couple ungreased cookie sheets.
1/3 cup margarine or butter, softened
1/3 cup shortening
1/2 cup white sugar
1/2 cup brown sugar
1 teaspoon vanilla extract
1-1/2 cups all purpose flour
1/2 teaspoon baking soda
1/2 teaspoon salt
1 cup candy coated chocolate candies
Cream together butter, shortening, and sugars. Beat in the egg and vanilla extract. Stir in the flour, baking soda, and salt. Add the m&ms and incorporate well.
Drop dough by heaping teaspoons- or use a small size cookie scoop- onto the cookie sheets.
Bake 8-10 minutes, until light brown.
The centers will be soft, but will finish cookie upon removal from oven.
Cool a minute or two on the sheets than remove to finish cooling.
You will get 2-1/2 – 3 dozen cookies.
You can also make bars by pressing the dough into a 13×9 inch cake pan and baking 20 minutes, until golden.