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Iced Oatmeal Cookie Bars Recipe

5 Stars 4 Stars 3 Stars 2 Stars 1 Star 4.5 from 32 reviews
  • Author: Sarah
  • Prep Time: 15 minutes
  • Cook Time: 24 minutes
  • Total Time: 39 minutes
  • Yield: 16 squares
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian

Description

These Iced Oatmeal Cookie Bars combine the hearty texture of oats with warm cinnamon and a smooth vanilla icing, creating a delightful treat perfect for any occasion. With a tender, chewy base and a sweet glaze on top, these bars are easy to make and sure to satisfy your cookie cravings.


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. Preheat and Prepare Pan: Preheat your oven to 350°F and line an 8 x 8 inch baking pan with parchment paper. Set aside.
  2. Process Oats: Pulse the old fashioned oats in a food processor until they are cut into smaller pieces but not ground into oat flour. Set aside.
  3. Mix Dry Ingredients: In a separate bowl, whisk together the pulsed oats, all-purpose flour, baking soda, cinnamon, and salt. Set aside.
  4. Mix Sugars and Butter: In a medium bowl, combine the melted butter with granulated and brown sugars. Mix on low speed or whisk for about 1 minute until the mixture resembles wet sand.
  5. Add Wet Ingredients: Add the egg, vanilla extract, and molasses to the butter and sugar mixture. Mix well to combine.
  6. Combine Dry and Wet: Fold the dry ingredients into the wet mixture using a large spatula or wooden spoon just until incorporated. Be careful not to over mix.
  7. Bake Bars: Transfer the dough to your prepared pan and bake for 24 minutes, or until the edges are set and the top is a rich golden brown. Avoid overbaking to keep bars moist.
  8. Cool Bars: Remove from oven and cool bars in the pan on a wire rack for 1 to 2 hours until they reach room temperature.
  9. Prepare Icing: In a medium bowl, whisk together powdered sugar, milk, and vanilla extract until thick but smooth. Adjust consistency by adding more powdered sugar if needed.
  10. Ice Bars: Once bars are cool, spread the vanilla icing evenly over the top using a spoon, allowing bits of the cookie to show through.
  11. Set and Serve: Allow the icing to set before slicing the bars into 16 squares and serving.

Notes

  • Store bars tightly covered at room temperature for up to 4 days to maintain freshness.
  • Bars can be frozen without icing for up to 3 months. Allow to cool completely before freezing and defrost at room temperature before icing.
  • Do not overbake the bars to avoid dryness; golden edges and top indicate doneness.
  • Pulse oats gently to keep texture—avoid turning into fine oat flour for best bar texture.

Nutrition

  • Serving Size: 1 square
  • Calories: 180 kcal
  • Sugar: 12 g
  • Sodium: 110 mg
  • Fat: 8 g
  • Saturated Fat: 5 g
  • Unsaturated Fat: 2 g
  • Trans Fat: 0 g
  • Carbohydrates: 25 g
  • Fiber: 2 g
  • Protein: 2 g
  • Cholesterol: 30 mg