Peanut Butter Chewies

1/2 Cup margarine or butter
1/2 Cup peanut butter(I use smooth)
1 1/2 Cups granulated sugar
2 eggs
1/2 teaspoon vanilla
1 Cup self-rising flour

Preheat oven to 350*F. Melt margarine and peanut butter together(it takes about a minute in the microwave). Stir until blended well. Add eggs and sugar. Mix well. Add vanilla, stir in flour and mix well. Pour into a 9"X9" greased & floured(I spray my pan with Pam)pan. Bake 20-30 minutes until brown and firm looking on top.