Cinnamon Blondie Bars with Cream Cheese Frosting
Brown butter blondies swirled with warm cinnamon spice, topped with tangy cream cheese frosting. Dense, chewy bars with a toasty cinnamon backbone and smooth frosting finish. Perfect for potlucks, afternoon tea, or dessert boxes. This version skips yeast and layering—just one bowl, one pan, and straight to the oven for weeknight baking.
Ingredients
- ½ cup unsalted butter, melted
- 1 large egg
- 1 cup light brown sugar, packed
- 1 tablespoon vanilla extract
- 2 to 3 teaspoons cinnamon
- 1 cup all-purpose flourwhole wheat flour0.75:1ratio
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- ½ teaspoon salt
- 6 ounces cream cheese, softened
- ¼ cup unsalted butter, softened
- 1 ½ cups confectioners' sugar
- ½ teaspoon vanilla extract
- cinnamon, for garnishing
Instructions
- 1
Preheat oven to 350F. Line 8-by-8-inch pan with foil and spray with cooking spray.
- 2
Melt butter in microwave-safe bowl about 1 minute on high power.
- 3
Wait briefly, then whisk in egg, brown sugar, vanilla, and cinnamon until smooth.
- 4
Stir in flour and salt until just combined; do not overmix.
- 5
Pour batter into prepared pan and smooth top lightly with spatula.
- 6
Bake 20 to 24 minutes until center is set and toothpick comes out clean or with few moist crumbs.
- 7
Cool in pan on wire rack for at least 90 minutes before frosting.
- 8
Beat cream cheese, softened butter, confectioners' sugar, vanilla, and salt with electric mixer until light and fluffy, 2 to 3 minutes.
- 9
Spread frosting evenly over cooled blondies with spatula or knife.
- 10
Sprinkle cinnamon over frosting, slice, and serve.
Tips
Cool blondies fully before frosting to prevent melting. At least 90 minutes ensures clean slices and frosting that sets properly.
Use 2 teaspoons cinnamon if you prefer subtle spice; the 3-teaspoon version is bold. Taste the batter to adjust before baking.
Don't overmix flour—stir just until combined to keep blondies tender and chewy, not dense or tough.
Good to Know
Airtight at room temperature up to 4 days, or refrigerated up to 1 week. Frosting-topped bars dry out faster in fridge. Extra frosting keeps airtight in fridge for at least 2 weeks.
Bake blondies up to 2 days ahead; store unfrosted in airtight container. Frosting can be made 1 day ahead and refrigerated. Assemble and frost up to 8 hours before serving.
Cut into 9 or 12 squares. Serve at room temperature or slightly chilled. Pairs well with coffee, tea, or milk. Room-temperature bars are chewier; chilled bars slice cleaner.
Common Mistakes
Overbake to avoid dry, dense blondies; pull at 20-24 minutes when center is barely set.
Don't skip the 90-minute cool to avoid melted frosting sliding off.
Do not overmix flour to avoid tough, cake-like texture instead of chewy bars.
Add frosting while blondies are completely cool to prevent pooling or sliding.
Substitutions
Dairy-Free Swaps
General Alternatives
FAQ
Can I freeze these bars?
Yes. Freeze unfrosted blondies up to 3 months in airtight container; thaw 1-2 hours at room temp. Frosted bars freeze 1-2 months but may separate slightly; frost after thawing for best texture.
What if my frosting is too soft or grainy?
Soft frosting: chill 15-30 minutes before spreading. Grainy: cream cheese or butter may have been cold; beat 2-3 minutes longer. If butter was not fully softened, cream cheese and butter must both be room temperature for smooth, fluffy frosting.
How long do blondies stay fresh?
4 days airtight at room temp (preferred; frosting stays best). 1 week refrigerated, but blondies dry out faster in fridge due to moisture loss. Unfrosted, they last slightly longer. Freeze for longer storage.