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Molly Beth’s Chocolate Peanut Butter Oatmeal Cookie Bars Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4 from 12 reviews
  • Author: Jessica
  • Prep Time: 10 minutes
  • Cook Time: 20 minutes
  • Total Time: 30 minutes
  • Yield: 9 servings
  • Category: Dessert
  • Method: Baking
  • Cuisine: American

Description

Molly Beth’s Chocolate Peanut Butter Oatmeal Cookie Bars are a deliciously chewy and gooey treat featuring a perfect blend of creamy peanut butter, rich chocolate chips, and hearty old-fashioned oats. Baked to golden perfection with a slightly gooey center, these bars satisfy cookie cravings with a bar’s convenience and are perfect for enjoying warm or at room temperature.


Ingredients

Wet Ingredients

  • ½ cup butter (softened at room temperature)
  • ½ cup brown sugar
  • ½ cup granulated sugar
  • 1 egg (room temperature)
  • ½ heaping cup creamy peanut butter
  • ½ teaspoon vanilla bean paste

Dry Ingredients

  • 1 cup all-purpose flour
  • ½ teaspoon baking soda
  • ¼ teaspoon salt
  • 1 cup old-fashioned oats (rolled oats)

Add-ins

  • 1 ½ heaping cups chocolate chips, plus extra for topping (optional)


Instructions

  1. Preheat the oven: Pre-heat the oven to 350° F. Line an 8×8 inch baking pan with parchment paper to prevent sticking and make the bars easier to remove.
  2. Cream the butter and sugars: In a large mixing bowl, use an electric mixer to combine the softened butter, brown sugar, and granulated sugar until light and fluffy.
  3. Add wet and dry ingredients: Mix in the egg, creamy peanut butter, and vanilla bean paste. Then add the all-purpose flour, baking soda, and salt, mixing only until just combined to avoid overworking the dough. Stir in the old-fashioned oats and chocolate chips until evenly incorporated.
  4. Prepare to bake: Spread the cookie dough evenly in the prepared pan. For extra chocolatey goodness, sprinkle additional chocolate chips on top as desired.
  5. Bake the bars: Bake for 18-22 minutes until the edges are set and start to turn golden brown. The center will still be slightly jiggly, ensuring a soft and gooey texture. If you prefer a firmer consistency, bake for an additional 5-7 minutes.
  6. Cool before serving: Place the pan on a cooling rack and let the bars cool for at least 15-20 minutes so they can set. They can be enjoyed warm with a fork or completely cooled and cut into bars.
  7. Serve and store: Serve the bars on their own or with ice cream for an indulgent treat. Store any leftovers covered at room temperature to maintain freshness.

Notes

  • For best texture, do not overbake; the center should remain slightly jiggly when you remove the bars from the oven.
  • Feel free to customize the chocolate chips by using milk, dark, or semi-sweet varieties.
  • The bars are delicious served warm but set up better for neat bar slices after cooling completely.
  • Store leftovers in an airtight container at room temperature for up to 3 days for optimal freshness.
  • The parchment paper liner helps with easy removal and cleanup.