Why Are My Cupcakes Sinking in the Middle?
Sinking cupcakes are almost always caused by underbaking, too much leavening, or opening the oven too early. The good news: every cause has a simple fix.
The 5 Most Common Causes
Underbaked
Cupcakes that look done on the outside can still be raw in the center — and they collapse as they cool.
Test with a toothpick in the center — it should come out clean. The top should spring back when lightly pressed.
Too much baking powder
Excess leavening makes cupcakes rise too fast, then collapse before the structure sets.
Use exactly the amount in the recipe. Most cupcake recipes need 1–1.5 tsp baking powder per cup of flour.
Opening the oven too early
Cold air causes the fragile rising structure to collapse before it sets.
Don't open the oven for at least the first 15 minutes of baking. Use the oven light to check progress.
Overfilled cupcake liners
Too much batter rises over the top and then collapses back into the center.
Fill liners ⅔ full — use an ice cream scoop for consistent portions.
Cold ingredients
Cold eggs or butter don't emulsify properly, creating an unstable batter that collapses.
Bring eggs, butter, and milk to room temperature before mixing.
💡 Prevention Tips
- ▸A higher start temperature (425°F for 5 min then 350°F) creates a dome that holds.
- ▸Room temperature ingredients always produce more stable batters.
- ▸Rotate the pan halfway through — but only after the first 15 minutes.
- ▸Silicone cupcake molds produce more even baking than metal tins.