No Bake Chocolate Oat Bars

These are kind of like inside out no bake cookies, with a few differences in the ingredients.  So good!  Recipe came from Von's Kitchen.

Ingredients:

1 cup butter (I used margarine and it was ok)
1/2 cup packed brown sugar
1 tsp vanilla
3 cups uncooked quick oats
1 cup semisweet chocolate chips (I just had milk chocolate and it worked ok)
1/2 cup crunchy or creamy peanut butter

Grease 9" square baking pan.  Melt butter in large saucepan over medium heat.  Add brown sugar and vanilla; mix well.  Stir in oats.  Cook over low heat a couple minutes until well blended.  Press half mixture into prepared pan, using back of large spoon to spread evenly.  Meanwhile, melt chocolate chips in small saucepan over low heat, stirring occasionally.  Stir in peanut butter.  Pour chocolate mixture over oat mixture in the pan; spread evenly with knife or spoon.  Crumble remaining oat mixture over chocolate layer, pressing down gently.  Cover and refrigerate 2-3 hours or overnight.