Master Muffin Recipe

Name: Master Muffin Recipe
Prep time: 15 min
Cook time: 20 min
Total time: 35 min
Cuisine: American
Ingredients: 1 and 3/4 cups (219g) all-purpose flour (spooned & leveled); 1 teaspoon baking powder; 1 teaspoon baking soda; 1/2 teaspoon salt; 1/2 teaspoon ground cinnamon; 1/2 cup (8 Tbsp; 113g) unsalted butter, softened to room temperature; 3/4 cup (150g) packed light brown sugar (or granulated); 2 large eggs, at room temperature; 1/2 cup (120g) sour cream or plain yogurt, at room temperature; 1 and 1/2 teaspoons pure vanilla extract; 1/4 cup (60ml) milk (any kind), at room temperature