Grandma Sandberg's Monster Cookies

4 cups sugar
2 cups butter or margarine
2 lbs (4 1/2 cups) brown sugar
3 lbs crunchy peanut butter
1 dozen eggs
1 Tbsp vanilla
8 tsp baking soda
18 cups (a 2 lbs, 10 oz box) oatmeal
1 lb M&M candies
1 lb chocolate chips

Combine first 7 ingredients. Mix very well. Add last 3 ingredients. Mix very well. Make each cookie about the size of a golf ball, then flatten out by hand. Bake at 350 degrees for 10-15 minutes, depending on size of cookie.

This is a huge recipe but the dough keeps well in the refridgerator for a long time.