Name: Jumbo Blueberry Crumb Muffins
Prep time: 15 min
Cook time: 30 min
Total time: 55 min
Yield: 6 Jumbo Muffins
Ingredients: 1/2 cup granulated sugar; 3/4 cup all-purpose flour (not packed); 1/2 teaspoon ground cinnamon; 6 tablespoons unsalted butter, chilled and cut into tiny pieces; 3 cups plus 2 tablespoons all-purpose flour, divided; 1 tablespoon baking powder; 1/4 teaspoon ground nutmeg; 1/2 teaspoon ground cinnamon; 1/2 teaspoon salt; 6 tablespoons unsalted butter, at room temperature; 1 cup granulated sugar; 1/3 cup light brown sugar, packed; 1 large egg plus 2 large egg yolks, at room temperature; 2 teaspoons pure vanilla extract; 3/4 cup whole milk; 1/3 cup full-fat sour cream; 1 and 1/2 cups blueberries