01 -  Preheat oven to 350°F (175°C). Line a 12-cup muffin tin with paper liners or grease thoroughly. 
 02 -  In a skillet set over medium heat, melt 1 tablespoon butter. Add diced apples, brown sugar, and cinnamon. Stir and cook for 4–5 minutes until the apples become tender and caramelized. Remove from heat and allow to cool briefly. 
 03 -  In a large bowl, whisk together all-purpose flour, granulated sugar, baking powder, baking soda, salt, and ground cinnamon until evenly blended. 
 04 -  In a separate bowl, whisk eggs, melted butter, whole milk, and vanilla extract until fully incorporated. 
 05 -  Pour wet ingredients into dry ingredients, stirring gently with a spatula until nearly combined. Avoid overmixing for optimal texture. 
 06 -  Fold caramelized apples and any skillet juices into the muffin batter until distributed evenly. 
 07 -  Portion batter evenly into prepared muffin cups, filling each approximately three-quarters full. 
 08 -  Bake for 22–25 minutes, until a toothpick inserted in the center of a muffin comes out clean. Cool muffins in the tin for 5 minutes before transferring to a wire rack. 
 09 -  In a microwave-safe bowl, combine soft caramel candies and heavy cream. Microwave in 20-second intervals, stirring after each, until caramel is smooth and melted, about 1 to 1.5 minutes. 
 10 -  Drizzle warm caramel sauce generously over cooled muffin cups. Serve warm or at room temperature.