Homemade Mini Coffee Cake with Cinnamon Streusel Topping - Quickie Treats

Ingredients

• 3 tablespoons (36g) brown sugar
• 3 tablespoons (36g) granulated sugar
• ½ teaspoon cinnamon
• ⅛ teaspoon nutmeg (optional)
• ⅛ teaspoon salt
• 4 tablespoons (56g) unsalted butter, melted
• ½ cup + 1 tablespoon (68g) all-purpose flour
• ½ cup + 2 tablespoons (75g) all-purpose flour
• ½ teaspoon + ⅛ teaspoon baking powder
• 2 tablespoons (28g) unsalted butter, softened
• ¼ cup (50g) granulated sugar
• 1 large egg, room temperature
• ½ teaspoon vanilla extract
• 2 tablespoons sour cream
• 2 tablespoons milk