2 cups all-purpose flour Provides structure and a light, fluffy texture.

1/2 cup granulated sugar Adds sweetness to balance tart flavors.

2 teaspoons baking powder Helps the donut holes rise and become airy.

1/4 teaspoon salt Enhances overall flavor depth.

1 cup fresh blueberries Offers natural sweetness and antioxidant benefits.

1/2 cup lemon curd Infuses a tangy, vibrant citrus taste.

2 large eggs Bind ingredients and contribute to moistness.

3/4 cup whole milk Adds moisture and richness.

4 tablespoons unsalted butter, melted Adds tenderness and flavor.

all-purpose flour As noted in additional details for base dough.

granulated sugar For general sweetness in the mix.

baking soda Aids in rising the dough.

salt Boosts taste as required.

buttermilk Contributes to a tender crumb.

eggs Helps bind the batter effectively.

Greek yogurt or sour cream Adds creaminess and tang.

salted butter Enhances richness in the dough.

vanilla extract or paste Provides aromatic flavor.

fresh or frozen blueberries Brings in berry goodness.

fresh lemon juice Adds extra zing.

lemon zest Infuses bright citrus notes.

powdered sugar For dusting or glazing.