Directions
Heat the oven to 350°F. Line a 9-inch square pan with parchment, leaving an overhang on two sides.
Whisk the oats, flour, baking soda and salt.
In a large bowl stir the melted butter, peanut butter and brown sugar until smooth. Beat in the egg and vanilla.
Stir in the dry ingredients, then the chocolate chips. Press the dough evenly into the pan.
Bake 22 to 25 minutes, until the edges are golden and the center is set. Cool completely in the pan before lifting out and cutting into 16 bars.
Tip
Cutting while warm makes crumbly bars. Wait until they are fully cool.
Storing
Keep airtight up to 4 days or freeze up to 2 months.
Swaps
Almond or sunflower seed butter works in place of peanut butter. Check labels for allergens. Check ingredient labels if you cook for someone with an allergy. See the Disclaimer.