These adorable Speculoos Tartlets are decadent and buttery. They will melt in your mouth and whisk away your stresses. These are the perfect sweet treats to surprise your guests with after a decadent dinner party. There are only 4 to 5 servings, so plan accordingly when you pick up the ingredients. These tartlets combine the rich flavors of speculoos cookies with butter and powdered sugar for a treat that is out of this world.