Melissa’s Blueberry Muffins

INGREDIENTS

1 3/4 cups s

All purpose flour

1/2 teaspoon

Salt

1 tablespoon

Baking powder

1 1/2 cups s

Frozen blueberries

Egg

1 cup

Sugar

1/4 cup

Melted butter

1 teaspoon

Vanilla

1/2 teaspoon

Lemon juice

1 cup

Sour cream or plain Greek yogurt

1/4 cup

Softened butter (crumb topping)

1/2 cup

All purpose flour (crumb topping)

1/2 cup

Sugar (crumb topping)