• Preheat oven to 350 degrees F. Heat a small skillet over medium-low heat and add diced apples with 3 tablespoons apple cider, and a pinch of cinnamon and salt. Cook, stirring occasionally, until apples are soft and caramely, about 8-10 minutes. In a bowl, whisk together flour, oats, baking soda, baking powder, salt and spices. Set aside. Line a muffin tin with liners.
• In a large bowl, whisk egg and brown sugar together until smooth and no lumps remain. Add in vanilla extract, butter, apple sauce and apple cider, whisking again until smooth. Gradually add in dry ingredients, mixing until just combined. Fold in diced apples. Do not overmix! Fill each muffin liner 2/3 of the way full with batter (I use an ice cream scoop to get the muffins to be of equal size).
• Bake for 15-17 minutes, or until tops are no longer wet and become slightly golden. Top with glaze if desired!

brown butter apple cider glaze

• In a large bowl combine brown butter, vanilla extract and powdered sugar. Whisk until the mixture comes together then add in 1 tablespoon of apple cider, continuing to mix. I always stir my glazes for a good 3-4 minutes so they really come together. If it still doesn’t appear glaze-like, add in cider 1/2 tablespoon at a time and mix again. Don’t worry if it becomes too liquidy – just add a tiny bit of powdered sugar until you get the desired consistency. Spoon glaze on warm muffins or dip each top in the glaze, then serve.