Crumble the spiced speculoos and mix in a bowl with the flour, baking powder, baking soda and the spices. In another bowl, whisk together eggs, sugar, buttermilk, mulled wine and margarine, ideally with a hand mixer. Fold the liquid mixture into the flour mixture.
Pour the dough into the recesses of the muffin tray or the paper molds and bake in the preheated oven (center, 160 ° C fan oven) for 20-25 minutes.