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Cinnamon Sugar Blondie Bars with Vanilla Frosting Recipe

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4.3 from 33 reviews

These cinnamon sugar bars are a delightful treat featuring a moist and tender crumb spiced with cinnamon and topped with a sweet cinnamon sugar mixture. Finished with a smooth vanilla frosting, they are perfect for any occasion as a snack or dessert.

  • Total Time: 45 minutes
  • Yield: 12 servings

Ingredients

Bars

  • 2 cups all-purpose flour
  • 1 cup brown sugar
  • 1/2 cup granulated sugar
  • 1/2 cup unsalted butter, softened
  • 1/2 cup sour cream
  • 2 large eggs
  • 1 tablespoon vanilla extract
  • 1 tablespoon ground cinnamon
  • 1 teaspoon baking powder
  • 1/2 teaspoon baking soda
  • 1/4 teaspoon salt

Frosting

  • 1 cup powdered sugar
  • 2 tablespoons milk
  • 1 teaspoon vanilla extract

Topping

  • 1 tablespoon ground cinnamon
  • 2 tablespoons granulated sugar (for topping)

Instructions

  1. Preheat and prepare pan: Preheat your oven to 350°F (175°C) and grease a 9×13 inch baking pan to prevent sticking.
  2. Cream butter and sugars: In a large bowl, cream together the softened unsalted butter, brown sugar, and granulated sugar until the mixture is smooth and fluffy.
  3. Add wet ingredients: Incorporate the eggs, sour cream, and vanilla extract into the creamed mixture, blending well until fully combined and smooth.
  4. Mix dry ingredients: In a separate bowl, whisk together the all-purpose flour, baking powder, baking soda, ground cinnamon, and salt to evenly distribute the leavening and spices.
  5. Combine wet and dry: Gradually add the dry ingredients to the wet mixture, stirring gently until just combined to avoid over-mixing which could make the bars tough.
  6. Spread batter: Evenly spread the batter into the prepared greased baking pan, smoothing the top with a spatula.
  7. Add cinnamon sugar topping: In a small bowl, mix together 1 tablespoon ground cinnamon with 2 tablespoons granulated sugar and sprinkle this evenly over the batter for a sweet, crunchy topping.
  8. Bake: Bake in the preheated oven for 25-30 minutes, or until a toothpick inserted into the center comes out clean, indicating the bars are fully cooked.
  9. Cool bars: Remove the pan from the oven and allow the bars to cool completely to room temperature before adding the frosting.
  10. Prepare and spread frosting: Whisk together the powdered sugar, milk, and vanilla extract until smooth and creamy. Spread the frosting evenly over the cooled bars for a sweet finishing touch.

Notes

  • Ensure the butter is softened to room temperature for easier creaming with sugars.
  • Do not over-mix the batter once the dry ingredients are added to keep the bars tender.
  • Allow bars to cool fully before frosting to prevent the frosting from melting and sliding off.
  • You can substitute the milk in the frosting with cream or a dairy-free alternative if desired.
  • Store bars in an airtight container at room temperature for up to 3 days or refrigerate for up to a week.
  • Author: Olivia
  • Prep Time: 15 minutes
  • Cook Time: 30 minutes
  • Category: Dessert
  • Method: Baking
  • Cuisine: American
  • Diet: Vegetarian