Cinnamon Streusel Muffins

Name: Cinnamon Streusel Muffins
Prep time: 10 min
Cook time: 18 min
Total time: 28 min
Cuisine: European, German
Ingredients: 1 and ½ cup all-purpose flour; ½ cup brown sugar (light or dark, packed); 2 teaspoons baking powder; 1 and ½ teaspoon cinnamon; ¼ teaspoon baking soda; ¼ teaspoon salt; ¾ cup milk; 1 and ½ teaspoon vanilla extract; ⅓ cup vegetable oil (canola can also be used); 2 large eggs (room temperature, beaten); ⅓ cup granulated sugar; ⅓ cup brown sugar (light or dark, packed); 1 teaspoon ground cinnamon; ½ cup unsalted butter (melted and cooled)