In a large bowl, use an electric mixer to beat together the butter and sugar until fluffy, about 3 minutes. Add the eggs and vanilla, and beat until combined.
½ cup unsalted butter, 1 cup light brown sugar, 2 large eggs, 1 teaspoon pure vanilla extract
Add half the oat mixture and half of the flour mixture, beating between additions. Continue until all the dry ingredients are added.
Fill each muffin liner ½ - ⅔ of the way full. Bake for 15 -18 minutes or until a toothpick inserted in the center comes out clean.
Serve warm. Scroll up and see the post for tips, storage options, and FAQs.
Notes
*The calories listed are an approximation based on the ingredients in the recipe card and a serving size of 1 muffin. Actual calories will vary.*For more information, tips, and answers to frequently asked questions, please refer to the post.*Ovens and pans cook differently, so begin checking the muffins around 14-15 minutes. Adjust the bake time accordingly.