This is an oldie but goodie. They come out soft and chewy with an almost butterscotch/caramel flavor. They freeze really well, too.
Peanut Butter Oatmeal Cookies
1 c. peanut butter
1/2 c. butter, softened
1 c. brown sugar
1 1/2 t. baking powder
1/4 t. salt
1 t. vanilla
1 c. flour
2/3 c. oatmeal (I used quick-cooking, but you can use old-fashioned)
Heat oven to 350°. Cream peanut butter and butter together. Add sugar. Beat until well mixed. Add egg, baking powder, salt, and vanilla. Beat well. Stir in flour and oats. Drop by spoonfuls onto greased cookie sheet. Bake 8-10 minutes, just until very lightly browned and set. Let cool 2-3 minutes before removing from the sheet. Cool completely before freezing.
Makes 3-4 dozen, but it's really easy to double or even triple.