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Iced Oatmeal Cookie Bars Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 5 from 13 reviews
  • Author: Lucy
  • Prep Time: 15 minutes
  • Cook Time: 24 minutes
  • Total Time: 39 minutes
  • Yield: 16 squares
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Description

Delicious and soft iced oatmeal cookie bars with a cinnamon and molasses flavor, topped with a smooth vanilla icing. Perfect as a sweet snack or dessert, these bars are easy to make and bake in just 20 minutes.


Ingredients

Units Scale

Cookie Bars

  • 1/2 cup (113 g) unsalted butter, melted and slightly cooled
  • 1 cup (95 g) old fashioned oats
  • 1 cup plus 2 tablespoons (140 g) all-purpose flour, spooned and leveled
  • 1 teaspoon baking soda
  • 1 teaspoon cinnamon
  • 1/2 teaspoon salt
  • 1/2 cup (100 g) granulated sugar
  • 1/2 cup (100 g) light brown sugar, packed
  • 1 large egg, room temperature
  • 1 teaspoon vanilla extract
  • 1 tablespoon molasses (or honey)

Vanilla Icing

  • 1/2 cup (60 g) powdered sugar, sifted
  • 1 to 2 tablespoons whole milk
  • 1/4 teaspoon vanilla extract

Instructions

  1. Prepare the Oven and Pan: Preheat your oven to 350°F. Line an 8 x 8 inch baking pan with parchment paper and set it aside.
  2. Process Oats: Melt the butter and transfer to a medium bowl to cool for about 10 minutes. Meanwhile, pulse the oats in a food processor until they are cut into smaller bits but not turned into oat flour.
  3. Mix Dry Ingredients: In a separate bowl, whisk together the pulsed oats, all-purpose flour, baking soda, cinnamon, and salt. Set aside.
  4. Combine Wet Ingredients: Add granulated sugar and brown sugar to the cooled melted butter. Mix on low speed or whisk for 1 minute until the mixture resembles wet sand.
  5. Add Egg and Flavorings: Beat in the egg, vanilla extract, and molasses until well combined.
  6. Incorporate Dry Ingredients: Fold the dry ingredients into the wet mixture using a large spatula or wooden spoon until just combined. Avoid overmixing.
  7. Bake the Bars: Transfer the dough evenly into the prepared baking pan. Bake for 24 minutes or until edges are set and top is golden brown. Remove from oven and cool on a wire rack within the pan for 1 to 2 hours until room temperature.
  8. Make the Vanilla Icing: In a medium bowl, whisk together powdered sugar, 1 tablespoon of milk, and vanilla extract until thick and smooth. Add more milk if needed to reach spreadable consistency or more powdered sugar to thicken.
  9. Ice the Bars: Once cooled to touch, spread the vanilla icing evenly over the bars, allowing some cookie surface to show through.
  10. Serve: Allow the icing to set, then slice into 16 squares and serve.

Notes

  • Store bars tightly covered at room temperature for up to 4 days to maintain freshness.
  • For longer storage, freeze bars without icing for up to 3 months; thaw at room temperature before icing.
  • Ensure bars are completely cooled before adding icing to prevent melting.
  • You can substitute honey for molasses if a milder sweetness is preferred.
  • Do not overbake bars to keep them moist and chewy rather than dry.

Nutrition

  • Serving Size: 1 square (approx. 40 g)
  • Calories: 180 kcal
  • Sugar: 14 g
  • Sodium: 130 mg
  • Fat: 7 g
  • Saturated Fat: 4 g
  • Unsaturated Fat: 3 g
  • Trans Fat: 0 g
  • Carbohydrates: 26 g
  • Fiber: 2 g
  • Protein: 2 g
  • Cholesterol: 35 mg