Ingredients
Equipment
Method
Reduce the apple cider
- Simmer the apple cider until reduced to 1/2 cup, then cool to room temperature (steam and volume should noticeably decrease).
Bake the cupcakes
- Preheat the oven to 350°F and line a muffin pan with 12 liners (pan should be ready before mixing).
- Beat the unsalted butter and brown sugar until light and combined, then add the eggs and sour cream (mixture should look smooth and cohesive).
- Fold in the all-purpose flour, baking powder, baking soda, salt, and ground cinnamon, then fold in the reduced apple cider (batter should be thick but smooth with no dry flour pockets).
- Fill each liner two-thirds full and bake for 20 minutes, until the tops spring back and a toothpick comes out clean (golden edges cue doneness).
- Cool the cupcakes completely before frosting (cooling prevents the frosting from melting and sliding).
Make and pipe the salted caramel frosting
- Beat the unsalted butter and powdered sugar until fluffy, then mix in the salted caramel sauce until glossy (frosting should hold soft peaks).
- Pipe the frosting onto the cupcakes and finish with flaky salt (a light, visible sparkle cues the final texture).
Notes
Chill the salted caramel sauce until room temperature before beating it into the butter so the frosting stays thick and glossy. Store cupcakes in an airtight container in the refrigerator for up to 3 days; bring to room temperature before serving for best texture. Freezing is not recommended because the frosting can soften and weep. For a lighter option, use reduced-fat sour cream for a modest change in richness while keeping the cupcake crumb tender.
