S'mores Sandwich Cookies

Name: S'mores Sandwich Cookies
Prep time: 30 min
Cook time: 20 min
Total time: 50 min
Cuisine: American
Ingredients: 1 1/2 cups flour; 1 cup graham flour ((see note)); 1 tsp baking soda; 1/4 tsp salt; 1/2 tsp ground cinnamon; 3/4 cup unsalted butter, softened ((1 1/2 sticks)); 1 cup brown sugar, packed; 1/4 cup sugar (granulated); 3 Tbsp honey; 1 egg; 1 egg yolk; 1 tsp vanilla extract; 4 oz dark chocolate, finely chopped ((or chocolate of your choice)); 2 Tbsp heavy (whipping) cream; 2 egg whites; 1/4 tsp cream of tartar; 3/4 cup sugar; 1/2 cup agave ((see note)); 1/4 cup water; pinch salt