Ingredients
- 1/2 cup butter, softened
- 1/2 cup white sugar
- 1/2 cup brown sugar
- 1 egg
- 1 cup all-purpose flour
- 1 cup rolled oats
- 1/3 cup peanut butter
- 1/2 teaspoon baking soda
- 1/2 teaspoon vanilla extract
- 1/4 teaspoon salt
- 1 cup chocolate chips, or to taste
- 1/2 cup confectioners’ sugar
- 1/4 cup peanut butter
- 1 tablespoon milk, or more as needed
Directions
Preheat oven to 350 degrees F (175 degrees C). Grease a 9×13-inch baking dish.
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Beat butter, 1/2 cup white sugar, brown sugar, and egg in a large bowl until smooth. Stir in flour, oats, 1/3 cup peanut butter, baking soda, vanilla extract, and salt until dough is well mixed. Press dough into prepared baking dish.
Bake in preheated oven until golden brown, about 20 minutes; sprinkle with chocolate chips immediately. Let chocolate chips melt, about 5 minutes. Spread chocolate over cookie with a spatula or knife.
Mix confectioners' sugar, 1/4 cup peanut butter, and milk in a small bowl until smooth. Add more milk if mixture is too thick to pour; drizzle over chocolate and allow to cool. Cut into bars to serve.