Peanut Butter and Jelly Bars are a delicious cookie bar with the favorite combination of PB&J!
Preheat oven to 350 degrees F; line an 8x8 inch baking pan with 2 pieces of parchment paper so it hangs over all 4 sides.
Cream together the butter and sugar. Beat in the peanut butter, egg and vanilla. Then add the flour, salt, and baking powder. Beat just until combined and be careful not to overmix. Stir in the oats.
Press 2/3 of the batter into the bottom of the prepared pan. Spread the jam or jelly on top, leaving a rim of about 1/4 an inch all the way around. Crumble the remaining 1/3 of the dough on the top.
Bake until the bars look golden along the outside, about 32 minutes for gooey bars in the center, or up to 38 minutes for more set bars, being careful not to overbake.
Cool completely before cutting and serving. Store any leftovers wrapped at room temperature for up to 3 days.
Feel free to switch up the flavor of the jam or jelly with whichever is your favorite!