2cupspeeled and diced tart apples (such as Granny Smith)
0.5cupbrown sugar
0.5cuprolled oats
1teaspoonground cinnamon
0.25cupcold butter, cubed
Instructions
Preheat the Oven: Set your oven to 350°F (175°C). Prepare a standard muffin tin by lining it with muffin paper liners or lightly spraying each cup with cooking spray.
Combine Dry Ingredients: In a large mixing bowl, whisk together the all-purpose flour, granulated sugar, baking powder, baking soda, ground cinnamon, and salt until thoroughly mixed.
Mix Wet Ingredients: In a separate bowl, add the buttermilk, vegetable oil, and eggs. Whisk these ingredients together until the mixture is smooth and well combined.
Combine Mixtures: Pour the wet mixture into the bowl with the dry ingredients. Using a spatula, gently fold the ingredients together until just combined. Avoid overmixing—the batter should be slightly lumpy for tender muffins.
Add Apples: Carefully fold in the diced apples, making sure they are evenly distributed throughout the muffin batter.
Prepare Crumb Topping: In a small bowl, mix the brown sugar, rolled oats, and ground cinnamon for the crumb topping. Add the cold cubed butter and use your fingers or a pastry cutter to blend until the mixture resembles coarse crumbs.
Fill Muffin Tins: Spoon the batter into the prepared muffin cups, filling each about two-thirds full. Generously sprinkle the crumb topping over each filled muffin cup.
Bake the Muffins: Place the muffin tin in the preheated oven and bake for 18-20 minutes, or until a toothpick inserted into the center of a muffin comes out clean.
Cool Before Serving: Once baked, let the muffins cool in the tin for about 5 minutes. Then, transfer them to a wire rack to cool completely.
Notes
Serve warm, optionally dusted with powdered sugar or drizzled with a simple glaze.