Ingredients

2 sticks (1 cup) salted butter, at room temperature

1 cup creamy peanut butter

1 cup brown sugar

2 large eggs, at room temperature

1 tablespoon vanilla extract

2 cups all-purpose flour

2 cups old fashioned oats

1 teaspoon baking soda

1 teaspoon salt

1 1/2 cups creamy peanut butter (for topping)

2 cups powdered sugar

2 tablespoons unsweetened cocoa powder

1 tablespoon vanilla extract (for icing)

2 ounces dark or milk chocolate, melted

Instructions

Step 1: Preheat the oven to 350° F. Line a 9×13 inch baking dish or 13×18 inch half sheet pan with parchment paper for easy removal.

Step 2: In a large mixing bowl, beat together the butter, brown sugar, 1 cup peanut butter, and 1 tablespoon vanilla extract until smooth. Add the eggs one at a time, beating well after each.

Step 3: Stir in the flour, oats, baking soda, and salt until just combined. Press the dough evenly into the prepared pan using a spatula or your hands.

Step 4: Bake for 18-22 minutes, until the bars are just set in the center and lightly golden. Remove from oven and immediately dollop 1 1/2 cups peanut butter over the warm bars, spreading it into an even layer.

Step 5: Allow the bars to cool completely. For faster cooling, place the pan in the refrigerator.

Step 6: While the bars cool, make the icing. In a bowl, whisk together the powdered sugar, cocoa powder, 1 tablespoon vanilla extract, and 3 tablespoons water until smooth. Stir in the melted chocolate. If the icing is too thick, add 1-2 tablespoons more water to reach spreading consistency.

Step 7: Spread the chocolate icing evenly over the cooled bars. Let the icing set for about an hour before slicing and serving.

Tips & Variations

Use crunchy peanut butter if you prefer extra texture in your bars.

To make these bars nut-free, substitute sunflower seed butter for peanut butter.

For a fudgier topping, add an extra ounce of melted chocolate to the icing.

Press chopped peanuts or chocolate chips into the peanut butter layer before chilling for added crunch.

Storage

Store these bars in an airtight container at room temperature for up to 3 days, or refrigerate to keep them fresh for up to a week. If refrigerated, let bars come to room temperature before serving for best flavor and texture. You can also freeze them for up to 2 months; thaw overnight in the refrigerator and bring to room temperature before enjoying.

FAQs

Can I use natural peanut butter in this recipe?

Yes, natural peanut butter works, but it may make the bars a bit softer or oilier due to its higher oil content. You may need to slightly adjust baking time and watch the texture.

What’s the best way to cut the bars cleanly?

Use a sharp knife and warm the blade under hot water before slicing, wiping it clean between cuts. Chilling the bars thoroughly before cutting also helps achieve neat slices.