INGREDIENTS
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1 1/4 cup butter, softened
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1 1/2 cup sugar
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2 1/2 cup flour
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4 teaspoons baking powder
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1 1/4 teaspoon salt
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1/2 cup + 2 tablespoons almond meal (ground almonds)
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3 eggs + 3 egg yolks
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6 tablespoons milk
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1/4 cup blackberries
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3 egg whites
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1/4 cup sugar
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dash cream of tartar
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300 mL heavy whipping cream
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6 tablespoons blackberry jelly
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1 teaspoon unflavored gelatin (optional)
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Additionally, you need
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1/4 cup blackberry jam for sheet cake, 1/2 cup blackberry jam for layer cake