Caramel Apple Muffins

INGREDIENTS

2-Cups all-purpose flour

¾ Cup sugar

2 tsp. baking powder

2 ½ tsp. ground cinnamon

½ tsp. salt

1 large egg, room temperature

1 cup 2% milk

¼  cup butter, melted

2 tsp. vanilla extract

½ cup chopped peeled tart apple

12 caramels, chopped

Topping

½ cup packed brown sugar

¼ cup quick-cooking oats

3 Tbsp. butter, melted

1 tsp. ground cinnamon