Cut the chocolate bars into slices about 5 mm thick. Put cookies in a freezer bag and chop them finely with a dough roll. Knead cookie crumbs with butter and put them into a greased square springform pan (24 x 24 cm) and press them down to a flat base. Spread condensed milk on it, spread chocolate bars and chocolate drops on it
Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 20 minutes. Take out, let it cool down, remove from the tin and cut into approx. 36 rectangles (approx. 6 x 2.5 cm)