Mix cream cheese, peanut butter, 1 egg and 75 g sugar with the whisk of the hand mixer until smooth. Chop the chocolate. Melt with butter over a warm water bath. Whisk 7 eggs with an egg whisk.
Mix flour and baking powder in a bowl. Add 350 g sugar, salt, eggs and chocolate mixture. Mix everything briefly with the whisk of the hand mixer to a smooth dough. Grease a plum baking tray (approx. 24 x 36 cm).
Pour the chocolate dough into the mould and smooth it down. Put peanut mass in blobs on top, pull a fork through the two masses, so that a light marbling is created. Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 25-35 minutes.
Let it cool down on a cake rack. Caramelise 75 g sugar in a pan until golden. Add peanuts and mix everything. Spread on a piece of aluminium foil lightly coated with oil.
Cut the brownies into pieces. Dust with icing sugar. Coarsely chop peanut caramel and decorate brownies with it. More about ##Baking in the USA##.