Step 1

Heat the oven to 375ºF. Cream butter with lemon zest and 1 cup of the sugar until light and fluffy.

Step 2

Add the egg and vanilla and beat until combined. Meanwhile, toss the blueberries with ¼ cup of flour; then whisk together the remaining flour, baking powder, and salt.

Step 3

Add the flour mixture to the batter a little at a time, alternating with the milk. Fold in the blueberries. Note: Batter will be thick. This is OK.

Step 4

Grease a jumbo muffin tin (or a 12-cup muffin tin… though the jumbo is really fun) with butter or coat with non-stick spray. Distribute batter among muffin cups. Sprinkle batter with remaining tablespoon of sugar. Bake for 30 minutes (or less if using a 12-cup muffin tin). Check with a toothpick for doneness. If necessary, return pan to oven for a couple of more minutes. Let muffins cool in pan for about 7 minutes before serving.