How to Make Blueberry Muffins with Crumb Topping and Sour Cream - 酥顶蓝莓酸奶油马芬蛋糕的制作

Blueberry muffins with crumb topping and sour cream, step by step. Find in my channel the video on how to make homemade sour cream for this recipe!
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酥顶蓝莓酸奶油马芬蛋糕的制作步骤。简单的自制酸奶油做法请参考我的频道视频！
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超简单酸奶油做法: https://bit.ly/2UqFVGX

Enjoy!