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Ooeey Gooey Marshmallow Cookie Bars Recipe

Ooeey Gooey Marshmallow Cookie Bars Recipe


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4.9 from 28 reviews

  • Total Time: 45 minutes
  • Yield: 16 1x

Description

Indulgent marshmallow cookie bars blend creamy sweetness with rich chocolate layers, creating a nostalgic dessert that melts hearts. Gooey centers and crisp edges promise pure comfort, inviting you to savor each delightful bite.


Ingredients

Scale

Main Ingredients:

  • 320 g (11.3 oz) unsalted butter
  • 4 eggs
  • 340 g (12 oz) all-purpose flour
  • 1 cup chocolate chips
  • 1 cup mini marshmallows

Sweeteners:

  • 320 g (11.3 oz) brown sugar
  • 160 g (5.6 oz) granulated sugar

Flavor Enhancers:

  • 4 g (0.14 oz) salt
  • 8 g (0.28 oz) vanilla extract
  • 6 crushed graham crackers

Instructions

  1. Preheat the oven to 329°F and prepare an 8×8-inch baking pan by lining it with parchment paper, ensuring complete coverage for easy removal.
  2. Transform butter into a rich, golden-brown state by carefully heating it in a saucepan over medium heat, developing a deep nutty fragrance. Remove from heat and let cool slightly.
  3. Create a smooth base by whisking together the browned butter, brown sugar, granulated sugar, and salt until fully integrated and creamy.
  4. Incorporate eggs and vanilla extract into the sugar mixture, blending until the mixture becomes light and uniform in texture.
  5. Gently fold flour into the wet ingredients, maintaining a few flour streaks to ensure a tender texture. Carefully mix in chocolate chips, mini marshmallows, and crushed graham crackers, distributing them evenly throughout the dough.
  6. Transfer the batter to the prepared pan, spreading it uniformly with a spatula to create an even layer.
  7. Bake for 30 minutes, creating a golden foundation for the cookie bars.
  8. Remove from oven and strategically sprinkle additional chocolate chips and mini marshmallows across the surface.
  9. Return to the oven for 5 minutes, allowing the new toppings to melt and integrate with the base.
  10. For an enhanced finish, use a kitchen torch to lightly caramelize the marshmallows or briefly broil to achieve a golden-brown topping.
  11. Allow the bars to cool completely in the pan, which helps them set and makes cutting easier.
  12. Slice into square portions and serve, revealing the gooey, decadent layers of marshmallow, chocolate, and graham cracker.

Notes

  • Brown the butter carefully, stirring constantly to prevent burning and develop a rich, nutty flavor without scorching.
  • Use room temperature eggs to ensure smooth, even mixing and prevent lumpy cookie dough texture.
  • Avoid overmixing the batter to keep the bars tender and prevent tough, dense results.
  • Let the bars cool completely before cutting to achieve clean, neat slices and prevent crumbling.
  • For gluten-free version, swap graham crackers with gluten-free graham-style crackers and use gluten-free flour blend.
  • Store bars in an airtight container at room temperature for up to 3 days to maintain maximum gooeyness and freshness.
  • Enhance marshmallow toasting by using a kitchen torch for more controlled, even caramelization.
  • Experiment with different chocolate types like dark, milk, or white chocolate for unique flavor variations.
  • Prep Time: 15 minutes
  • Cook Time: 30 minutes
  • Category: Desserts, Snacks
  • Method: Baking
  • Cuisine: American

Nutrition

  • Serving Size: 16
  • Calories: 292
  • Sugar: 20 g
  • Sodium: 0.25 g
  • Fat: 16 g
  • Saturated Fat: 10 g
  • Unsaturated Fat: 6 g
  • Trans Fat: 0 g
  • Carbohydrates: 35 g
  • Fiber: 1 g
  • Protein: 2 g
  • Cholesterol: 41 mg