In a bowl mix softened butter with both types of sugars until light and creamy. I mix mine with a stand mixer paddle attachment for 3-5 minutes.
Add in vanilla extract and eggs one at a time, scraping down the bowl after each addition.
Sift the baking powder, baking soda, cream of tartar, salt, flour, cinnamon, cornstarch, and cocoa powder over the wet ingredients. Add the anise seeds on top.
Turn mixer on low and mix until just incorporated.
Using a 4 ounce scoop, scoop a portion of cookie dough.
Make a well in the center and stuff with a large marshmallow.
Pinch the dough closed around the marshmallow to seal it in.
Release the scoop of stuffed cookie dough into the bowl of cinnamon sugar. Roll the dough in the cinnamon sugar to coat all sides of the dough.
Place the dough on a parchment lined baking tray and repeat with remaining dough.
Allow the cookies to chill for two hours and up to 2 days in the fridge. You can also freeze and bake from frozen. Adjust baking time up 2-3 minutes if baking from frozen.
Bake cookies at a time at 375*F for 12 minutes. They will spread slightly when baking.
Cool cookies on wire rack. While cookies are cooling, make the spiced ganache.