INGREDIENTS
2 cups
Blueberries, fresh or frozen
1 tbsp
Lemon, zest
3
Eggs, large
1 cup
Blueberry jam, high-quality
4 tbsp
Blueberry or blackberry jam, high-quality
1/2 cup
Lemon juice, fresh
3 13/16 cups
All-purpose flour
2 tsp
Baking powder
1 tsp
Baking soda
1/4 cup
Brown sugar, packed
1 1/2 cups
Granulated sugar
1 tsp
Kosher salt
3 cups
Powdered sugar
1 tbsp
Vanilla extract
1 cup
Coconut oil
3 sticks
Butter, salted
1 cup
Buttermilk
1/2 cup
Greek yogurt, plain
4 oz
Mascarpone or cream cheese