Coffee Cake Muffins
1 ¼ tablespoons baking powder 1 ⅞ cups all-purpose flour 10 tablespoons unsalted butter, softened 2 large eggs, beaten 2 tablespoons white sugar 2 tablespoons whole milk 2 ¼ cups all-purpose flour 3 tablespoons ground cinnamon 4 ½ tablespoons brown sugar ¼ cup white sugar ¼ tablespoon salt ¼ teaspoon salt ½ cup unsalted butter, melted ½ tablespoon vanilla extract ¾ cup white sugar ¾ cup whole milk ¾ teaspoon pumpkin pie spice, or more to tast…