Coffee Cake Muffins

Ingredients

• 1 cup all-purpose flour
• 1/2 cup granulated sugar
• 1/4 cup brown sugar, packed
• 1/2 teaspoon ground cinnamon
• 1/4 teaspoon salt
• 1/4 cup unsalted butter, melted
• 1/4 cup milk
• 1 large egg
• 1 teaspoon vanilla extract
• 1/2 teaspoon baking powder
• 1/4 teaspoon baking soda
• For the crumb topping:
• 1/2 cup all-purpose flour
• 1/4 cup unsalted butter, chilled and cubed