Separate eggs. Knead 150 g flour, baking powder, sugar, spice, salt, butter in pieces, 1 egg yolk and possibly milk first with a hand mixer and then briefly with your hands until smooth. Cover and chill for about 20 minutes.
Knead ground almonds, icing sugar, 2 egg whites, flavour, lemon peel and lemon juice with a hand mixer until smooth. Knead in 40 g flour
Roll out half of the Spekulatius dough on a piece of baking paper (approx. 18 x 26 cm) to the size of the paper, cut in half lengthwise together with the paper. Pile half of the almond paste in the shape of bread on the 1st strip of dough, leaving an approx. 1 1/2 cm wide edge all around. Place the 2nd dough strip on top with the help of the paper, remove the paper. Press the dough well on the edge, cut off a little if necessary. Form a second loaf of dough and almond paste in the same way
Whisk 1 egg yolk and cream. Put the breads on a baking tray, spread them on the top and decorate with almonds. Bake in the preheated oven (electric cooker: 175 °C/circulating air: 150 °C/gas: level 2) for approx. 40 minutes. Let them cool down. Then cut into slices