01 - Preheat oven to 375°F. Grease a 24-cup mini muffin tin or line with mini paper liners.
02 - Combine diced apple with lemon juice, brown sugar, and ground cinnamon in a medium bowl. Set aside.
03 - Whisk together cornmeal, flour, granulated sugar, baking powder, and salt in a large mixing bowl.
04 - Whisk eggs, whole milk, melted butter, and vanilla extract in a separate bowl until smooth.
05 - Add wet mixture to dry ingredients, stirring just until incorporated. Do not overmix batter.
06 - Gently fold apple mixture into the cornbread batter.
07 - Spoon about 1 tablespoon of batter into each mini muffin cup to fill halfway.
08 - Press one piece of caramel candy into the center of each cup, then top with more batter to cover.
09 - Transfer pan to oven and bake 13–15 minutes until golden brown and a toothpick inserted off-center comes out clean.
10 - Let poppers cool in pan 5 minutes; remove to wire rack. Sprinkle with sea salt if desired. Enjoy warm.