In a medium bowl, mix the flour, cinnamon, cornstarch, salt, and baking powder. Set aside.
3 ¼ cups All-purpose flour, 1 teaspoon Baking powder, 1 teaspoon Ground cinnamon, 1 teaspoon Cornstarch, 1 teaspoon Salt
In a large bowl, mix the melted butter (it needs to be cooled to room temperature before using), brown sugar, sugar, vanilla, and eggs. Whisk until combined and smooth.
1 cup Unsalted butter, 1 cup Brown sugar, ½ cup White granulated sugar, 1 teaspoon Pure vanilla extract, 2 Large eggs
Add in the dry ingredients and use a rubber spatula to mix until just combined.
Let the cookie dough rest for 10 minutes. Preheat the oven to 350°F. Line two cookie sheets with parchment paper.
Use a large cookie scoop and scoop 6 cookie dough balls per cookie sheet. Use ⅛th measuring cup or the bottom of a spice jar to press a circle into the cookie dough. Then, use your hand to light press the dough into a nice circle. See pictures in my blog post.
Bake for 11 minutes. Take out of the oven, and press the measuring cup back into the hole. Then, bake for another 1-3 minutes until the edges are golden.
Cool the cookies completely on a cooling rack.
Brush the cookies with melted butter using a pastry brush (do 1 cookie at a time), roll the cookie in cinnamon sugar. Only worry about the outside of the cookie and not inside the hole.
2 tablespoon Unsalted butter, ½ cup White granulated sugar, 1 teaspoon Ground cinnamon
Top each hole with apple pie filling. Then, drizzle salted caramel on top.