Brown Sugar Cinnamon Swirl Cupcakes
Warm brown sugar cupcakes with a baked in cinnamon swirl, ready in 25 minutes prep and 18 minutes bake.
Last updated: August 6, 2026
Ingredients
- 1 1/2 cups all purpose flour
- 1 tsp baking powder
- 1/4 tsp baking soda
- 1/2 tsp salt
- 1/2 cup unsalted butter, softened
- 3/4 cup packed light brown sugar
- 2 large eggs, room temperature
- 1 tsp vanilla extract
- 1/2 cup buttermilk, room temperature
- 3 tbsp packed light brown sugar (for swirl)
- 1 tbsp ground cinnamon (for swirl)
- 1 tbsp melted butter (for swirl)
- 1 cup unsalted butter, softened (for frosting)
- 3 cups powdered sugar
- 1 tsp vanilla extract (for frosting)
- 1/2 tsp ground cinnamon (for frosting)
- 2 tbsp heavy cream
Instructions
Preheat oven to 350°F. Line a 12 cup muffin pan with paper liners.
Mix the cinnamon swirl filling first. Stir together brown sugar, cinnamon, and melted butter in a small bowl until it looks like wet sand. Set aside.
Whisk flour, baking powder, baking soda, and salt in a medium bowl.
Beat softened butter and brown sugar in a large bowl until light and fluffy, about 2 minutes.
Add eggs one at a time, beating well after each. Mix in vanilla.
Add the flour mix and buttermilk in three additions, starting and ending with flour. Mix just until combined.
Fill each liner with about 1 tablespoon of batter. Drop a small spoonful of cinnamon filling on top, then cover with more batter until liners are two thirds full.
Use a toothpick to swirl the cinnamon filling gently through the batter in each cup.
Bake 17 to 19 minutes, until a toothpick comes out clean. Cool in the pan 5 minutes, then move to a wire rack to cool fully.
For frosting, beat butter until smooth. Add powdered sugar, vanilla, cinnamon, and cream, then beat 3 minutes until fluffy.
Pipe or spread frosting on cooled cupcakes and dust with extra cinnamon if you like.
Pro Tips
- • Room temperature eggs and buttermilk blend into the batter more evenly, so the swirl bakes in nice ribbons instead of sinking.
- • Do not over swirl the cinnamon filling. Two or three gentle passes with a toothpick is enough.
- • If your brown sugar is hard and clumpy, warm it for 10 seconds in the microwave before mixing the swirl filling.
- • Frosting can be made a day ahead and kept in the fridge. Bring to room temperature and rebeat before piping.
Recipe Details
Timing
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Final Thoughts
These cupcakes bring cinnamon roll flavor to a classic cupcake without any yeast or waiting on dough to rise. The brown sugar batter stays moist for days, and that cinnamon ribbon inside is always a surprise for whoever bites in first. Bake a batch this weekend and see how fast they disappear.
Frequently Asked Questions
Why did my cinnamon swirl sink to the bottom of the cupcake?
This happens when the filling is too wet or the batter is too thin. Keep the cinnamon mix thick like wet sand, and add batter on both sides of the filling before swirling.
Can I use dark brown sugar instead of light brown sugar?
Yes. Dark brown sugar gives a deeper molasses flavor and a slightly darker crumb. Use it 1 to 1 in both the batter and the swirl filling.
Do these cupcakes need to be refrigerated?
Store them at room temperature in an airtight container for up to 2 days. After that, refrigerate for up to 5 days since the frosting has cream in it.
Can I make this recipe without buttermilk?
Yes, mix 1/2 cup whole milk with 1/2 tablespoon lemon juice or white vinegar. Let it sit 5 minutes before using it in the batter.
