Blueberry Muffins with Lemon and Ricotta

INGREDIENTS

2 cups

all purpose flour (no need to sift)

1/2 tsp

baking powder

1/2 tsp

baking soda

1/2 tsp

salt

1 cup

white granulated sugar

Zest from 2 lemons

1/2 cup

unsalted butter (room temperature)

1 cup

ricotta cheese (I used low fat)

egg

1 tbsp

freshly squeezed lemon juice

1 tsp

vanilla bean paste or pure vanilla extract (just throw out any imitation extract now, please)

1 cup

ish fresh blackberries

Turbinado Sugar - for topping