Step 1: Mix the self-rising flour, sugar, speculaas spice mix and salt. Add the butter and milk and knead into a firm ball of dough. Start with 6 tablespoons of milk, if the dough is too stiff you can add more milk.

Step 2: Wrap the dough in plastic wrap and refrigerate overnight. You can process and bake it immediately, but the flavor will be much better if you let it rest.

Step 3: Mix the almond paste with half of the beaten egg and knead well. This makes it easier to work with and gives it a better and tastier texture.

Step 4: Take half of the dough and roll it out to 20 x 20 cm. Place in a baking pan lined with parchment paper. Spread the almond paste mixture evenly. Roll out the remaining dough and place on top of the almond paste.

Step 5: Brush the top with the remaining beaten egg. Garnish with almonds and top with another layer of egg wash.

Step 6: Bake the filled speculaas for 40 minutes at 180°C/350℉ (conventional oven) or until done.