Servings
Font
Back
0 from 36 votes

Iced Oatmeal Cookie Bars (Little Debbie Copycat!)

The flavor of the classic cookies turned into fast, easy, chewy bars and the frosting is beyond amazing! They're even better than original!

Prep Time
5 mins
Cook Time
5 mins
Cooling Time
1 hr
Total Time
1 hr 30 mins
Servings: 12
Calories: 368 kcal
Course: Baked Goods
Cuisine: American

Ingredients

Bars
  • ½ cup unsalted butter melted
  • 1 large egg
  • 1 cup light brown sugar packed
  • 2 tablespoons medium dark, or full-bodied molasses
  • 1 tablespoon vanilla extract
  • ½ teaspoon salt
  • ¼ teaspoon cinnamon
  • 1 cup instant oats not old-fashioned or whole-rolled
  • ¾ cup all-purpose flour
Frosting
  • ½ cup unsalted butter softened
  • 1 ½ cups confectioners’ sugar
  • one 7-ounce jar marshmallow creme
  • ¼ to ½ teaspoon salt cuts some of the sweetness

Instructions

Bars 
    Cup of Yum
  1. Preheat oven to 350F. Line an 8-by-8-inch baking pan with aluminum foil, spray with cooking spray; set aside.
  2. In a large, microwave-safe bowl melt the butter, about 1 minute on high power.
  3. Wait momentarily before adding the egg so you don’t scramble it. Add the egg, brown sugar, molasses, vanilla, salt, cinnamon, and whisk until smooth.
  4. Add the oats and stir to combine.
  5. Add the flour and stir until just combined, don’t overmix.
  6. Turn batter out into prepared pan, smoothing the top lightly with a spatula. Bake for about 24 to 25 minutes, or until done. A toothpick inserted in the center should come out clean, or with a few moist crumbs, but no batter.
  7. Place pan on top of a wire rack to cool completely before frosting. Don’t frost warm bars or the frosting will melt.
Frosting 
  1. To the bowl of a stand mixer fitted with the paddle attachment (or large bowl and electric hand mixer), add the butter, confectioners’ sugar, and beat on medium-high speed (start on low so you don’t spray sugar everywhere) until light and fluffy, about 3 minutes.
  2. Stop, scrape down the sides of the bowl, and add the marshmallow creme, salt, and beat on medium-high speed until well combined, about 1 minute.
  3. Turn frosting out over bars and lightly smooth it with a spatula or offset knife. 

Notes

  • Storage: Bars will keep airtight at room temperature for up to 5 days. I’m comfortable storing buttercream-style frosting at room temp but if you’re not, refrigerate the bars noting they’ll be more prone to drying out in the fridge.

Nutrition Information

Serving 1 Calories 368kcal (18%) Carbohydrates 54g (18%) Protein 3g (6%) Fat 16g (25%) Saturated Fat 10g (50%) Polyunsaturated Fat 6g Cholesterol 56mg (19%) Sodium 203mg (8%) Fiber 1g (4%) Sugar 39g (78%)

Nutrition Facts

Serving: 12Serving

Amount Per Serving

Calories 368

% Daily Value*

Serving 1
Calories 368kcal 18%
Carbohydrates 54g 18%
Protein 3g 6%
Fat 16g 25%
Saturated Fat 10g 50%
Polyunsaturated Fat 6g 35%
Cholesterol 56mg 19%
Sodium 203mg 8%
Fiber 1g 4%
Sugar 39g 78%

* Percent Daily Values are based on a 2,000 calorie diet.