For the crumbles, put 175 g flour, 75 g sugar, 1 pinch of salt, 1 packet of vanillin sugar, 10 g cocoa, nut nougat cream, 1 egg and 80 g cold butter in pieces in a mixing bowl. Work into crumbles with your hands. Spread on a baking tray lined with baking paper. Bake in a preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for approx. 20 minutes. Remove from the oven, place on a cake rack and allow to cool.
Grease a springform pan (26 cm Ø) and sprinkle with flour. For the sponge mixture mix 150 g butter, 1 pinch of salt, 1 packet of vanilla sugar and 125 g sugar with the whisks of the hand mixer until creamy. Stir in 2 eggs one by one. Mix 175 g flour and baking powder, sieve on top and stir in. Add just under 1/3 of the cooled crumbles. Pour into the springform pan, smooth it down and bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: see manufacturer) for 20-25 minutes. Then remove from the oven, remove from the edge of the springform pan, place on a cake rack and let it cool down.
Wash, clean, drain well and dice the strawberries. Soak gelatine in cold water. Whip cream until stiff. Mix crème fraîche, fruit spread and 100 g sugar. Remove the base from the springform pan, place on a cake plate and enclose a cake ring tightly. Squeeze the gelatine well and dissolve in a small pot at low heat. Remove from the hotplate. First stir in 3-4 tablespoons of crème fraîche drop by drop, then pour into the remaining crème. Wait briefly until the cream begins to gel, then fold in 3 portions of cream. Pour half onto the base. Spread strawberries evenly on top. Spread the rest of the cream evenly. Crumble the remaining crumbles a little bit more if necessary, depending on their size, and spread evenly on the cream. Chill the cake for about 5 hours.
Carefully loosen the cake ring from the cake with a knife and remove it. Dust the cake with 1 tsp. cocoa. Cut it very carefully into pieces with a sharp knife.