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✏️Ingredients (weight 1.2 kg): Shortcrust pastry: flour - 500 g. soda - 4 g. salt - ¼ teaspoon, butter - 200 g., sour cream 20% - 200 g. Interlayer: flour - 170 g. sugar - 150 g. butter - 50 g. Additionally: egg - 1 piece, walnuts - 50 g. Bake for 12–15 minutes at 180 degrees.