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Preheat the oven to 180 Celsius degrees and arrange paper crowns in a muffin pan.
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In a bowl put sugar, sour cream, oil, eggs, vanilla and salt and mix into a uniform mixture.
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Add flour and baking powder and mix until combined.
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Add the raspberries and pistachio and fold gently to spread evenly in the mixture.
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Pour the batter into the muffins pan and fill almost to the rim.
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Bake the muffins for about 20-25 minutes or until swollen, golden and firm.
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Cool at room temperature and serve.