Mix the fat with sugar, a pinch of salt and lemon flavor or zest until creamy. Then add the eggs and milk and mix well with a whisk.
Put the speculoos in a freezer bag and chop with a rolling pin or meat tenderizer. Mix the flour, almonds, baking powder, baking soda and cinnamon well with the speculoos and stir in 2 portions into the fat-egg mixture. Just stir briefly until all the ingredients have combined.
Lightly grease 1 muffin tray with 12 hollows and fill 3/4 of the way with the batter. I still needed 3 silicone molds extra.
Bake in the oven preheated to 180 ° C on the 2nd rack from the bottom for 20 minutes.
Let cool down a little, take out of the mold.
Now mix the 150 g sifted powdered sugar with 1 teaspoon cinnamon and 2 tablespoons water to form a smooth, not too thin glaze, spread on the muffins and sprinkle with the sliced almonds.
Tip: Lightly toast the almonds in a pan without fat.