Preheat oven to 375 degrees F. Line two baking sheets with Silpats or parchment paper. Set aside.
In a medium bowl, combine flour, sugar, cinnamon, baking powder, salt, and oats. Set aside.
In the bowl of a stand mixer, combine butter, cream, corn syrup, and vanilla. Mix with the beater blade until smooth. Slowly add in the dry ingredients. Mix to combine.
Drop about 3/4 of a teaspoon of batter onto prepared baking sheets. Try to make the cookies all the same size. Place only 12 cookies on each sheet because the cookies will spread in the oven.
Bake for 8-10 minutes. Remove from oven and let cookies cool on baking sheets for 2 minutes. Carefully transfer cookies to a wire rack and cool completely.
Find 2 cookies that are about the same size. Spread one cookie with melted chocolate. Place other cookie on top. Repeat with remaining cookies.