Grease a square springform pan (24 x 24 cm; alternatively round, 26 cm Ø). Put pretzels in a freezer bag, close the bag. Run the cake roll over the bag and crumble the pretzels. Melt 225 g butter. Mix well with pretzel crumbs and brown sugar. Press about two-thirds of the pretzel mix firmly into the tin to form a base, chill for about 30 minutes.
For the peanut cream, meanwhile, mix 200 g soft butter, peanut butter and sieved icing sugar with the dough hooks of the mixer to a smooth mass. Spread it on the pretzel base until smooth.
Preheat oven (electric cooker: 200 °C/circulating air: 180 °C/gas: see manufacturer). Warm the fruit spread and spread it on the peanut mass. Spread the rest of the pretzel mix as crumbles on top. Bake in a hot oven (see tip) for 15-20 minutes, remove and let cool. Put the cake in a cool place for about 2 hours. Carefully remove from the tin and cut into cubes of approx. 3 cm.
For 2 glasses (approx. 200 g each): 400 g roasted peanut kernels and 1⁄2 puree TL sea salt in a high performance floor mixer until creamy. Pour into hot rinsed glasses. Close tightly with lids. Keep refrigerated for approx. 4 weeks.