One-Bowl Cinnamon Sugar Blondies Recipe for Quick Desserts

When you want something sweet right now (but don’t want a sink full of dishes), these one-bowl cinnamon sugar blondies understood the assignment. They’re soft, chewy, buttery, and topped with that classic cinnamon-sugar sparkle that makes the whole kitchen smell like a cozy bakery.

No mixer, no complicated steps, no chilling time. Just stir, sprinkle, bake, and you’ve got a quick dessert that feels way fancier than the effort it takes.

Why You’ll Love This

These blondies come together in one bowl with basic pantry ingredients, bake in under 30 minutes, and deliver big cinnamon-sugar vibes with a tender, chewy center and lightly crisp edges—perfect for last-minute cravings, casual hosting, or weekday dessert.

Ingredients

1/2 cup (113g) unsalted butter, melted and slightly cooled
1 cup (200g) packed light brown sugar
1 large egg, room temperature
1 large egg yolk, room temperature
2 teaspoons vanilla extract
1 1/4 cups (155g) all-purpose flour
1/2 teaspoon baking powder
1/2 teaspoon fine salt
2 teaspoons ground cinnamon (for the batter)
2 tablespoons granulated sugar (for topping)
1 teaspoon ground cinnamon (for topping)
Optional: 1/2 cup white chocolate chips or chopped walnuts/pecans

How to Make It

Preheat your oven to 350°F (175°C). Line an 8×8-inch pan with parchment paper, leaving a little overhang for easy lifting. Lightly grease if you want extra insurance.
In a medium mixing bowl, whisk together the melted butter and brown sugar until smooth and glossy, about 30 seconds.
Whisk in the egg, then the egg yolk, followed by the vanilla. The mixture should look thick and shiny.
Add the flour, baking powder, salt, and 2 teaspoons cinnamon. Switch to a spatula and fold just until you don’t see streaks of flour. If using white chocolate chips or nuts, fold them in now.
Scrape the batter into the prepared pan and spread it evenly to the corners. It will be thick—take your time.
In a small bowl, mix the granulated sugar with 1 teaspoon cinnamon. Sprinkle evenly over the top of the batter for that classic cinnamon-sugar crust.
Bake for 20–26 minutes, or until the edges look set and lightly golden and a toothpick inserted near the center comes out with a few moist crumbs (not wet batter).
Cool in the pan for at least 20 minutes, then lift out using the parchment. Slice into squares once they’re mostly cool for the cleanest cuts.

Tips for the Best Results

Don’t overmix once the flour goes in. Overmixing = tougher blondies. Fold until just combined.
Measure flour carefully. Too much flour makes them dry. If you can, spoon and level instead of scooping.
Pull them slightly early. Blondies keep setting as they cool, so “a few moist crumbs” is the sweet spot.
Use melted butter that’s cooled a bit. Hot butter can cook the egg and make the texture weird.
For extra chew, stick with brown sugar as written. It’s doing the most (in a good way).
Want sharper slices? Chill the slab for 20–30 minutes, then cut with a large knife wiped clean between cuts.

Variations

Snickerdoodle-style: Add 1/4 teaspoon cream of tartar to the dry ingredients for that classic tang.
Maple cinnamon: Swap 1 teaspoon vanilla for 1 teaspoon maple extract, or drizzle with a simple maple glaze after cooling.
Brown butter upgrade: Brown the butter first, then cool slightly before mixing. Nutty, caramel-like flavor = instant glow-up.
Apple pie moment: Fold in 1/2 cup finely diced peeled apple (pat dry) plus a pinch of nutmeg. Bake time may increase by 2–4 minutes.
Chai-spiced: Replace the batter cinnamon with 1 1/2 teaspoons cinnamon + 1/4 teaspoon each ginger and cardamom + a pinch of cloves.
Chocolate swirl: Dollop 2–3 tablespoons chocolate-hazelnut spread on top and swirl lightly before adding the cinnamon sugar topping.

Storage & Reheating

Store blondies in an airtight container at room temperature for up to 3 days, or refrigerate for up to 5 days for a firmer, extra-chewy bite. To reheat, microwave a square for 8–12 seconds for that just-baked softness (especially good with a scoop of vanilla ice cream if you’re feeling it).

FAQ

Can I make these cinnamon sugar blondies in a 9×13 pan?

Yes, but you’ll want to double the recipe for a standard 9×13 pan. If you bake a single batch in a 9×13, the blondies will be thinner and may finish faster—start checking around 14–18 minutes.

How do I know when blondies are done without overbaking?

Look for set edges and a center that’s no longer shiny. A toothpick near the center should come out with a few moist crumbs. If it comes out totally clean, they may be heading toward cakey and dry.

Why use an extra egg yolk?

The extra yolk adds richness and chew without making the blondies puffy. It helps create that dense, bakery-style texture that makes blondies so satisfying.

Can I freeze cinnamon sugar blondies?

Totally. Cool completely, slice, then wrap individual squares and place in a freezer bag or airtight container. Freeze up to 2 months. Thaw at room temperature, or microwave straight from frozen in short bursts (10–15 seconds at a time).

My cinnamon sugar topping melted into the batter—what happened?

This can happen if the batter is very warm (butter too hot) or if the topping is applied unevenly. Let the melted butter cool slightly before mixing, and sprinkle the cinnamon sugar evenly across the surface. You’ll still get great flavor, but a cooler batter helps the topping stay more “crackly.”