Peanut butter oatmeal cookies

1 1/2 cups (3 sticks) butter, soft
2 cups brown sugar
2/3 cup sugar
4 eggs
3 teaspoons vanilla extract
3 cups flour
2 teaspoons baking soda
1 teaspoon salt
1 teaspoon cinnamon
5 cups oatmeal
1 package peanut butter chips

Heat oven to 350°F.
Beat butter, brown sugar and sugar in bowl until creamy. Add eggs and vanilla; beat well. Combine flour, baking soda, salt and cinnamon; add to butter mixture, beating well. Stir in oats, and peanut butter chips (batter will be stiff). Drop by rounded teaspoons onto ungreased cookie sheet. Bake 10 to 12 minutes or until lightly browned.