These blueberry muffins are are topped with handfuls of ... Salt adds contrast (and balances out) sweet. Sour contrasts with ...

sour cream, powdered sugar, apple pie spice, and vanilla until stiff peaks form. Spoon the mixture over the muffins and top ...

Make the muffins: Butter a 12-cup muffin pan ... 1 minute. Beat in the sour cream, vanilla and lemon zest until blended. Add the dry ingredients and beat at low speed until almost blended.