Hi there, Millie! We've shared a couple of different blueberry versions recently. In early June we shared a blueberry lemon version on Instagram from @buttermilkbysam! She used the filling from our Lemon Brioche Buns with Blueberry Filling recipe. We also have an article, 5 ways to fill cinnamon rolls ... without the cinnamon, that has a blueberry-filled roll. We hope this can help and happy baking! 

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