These Black & Blueberry Gluten-Free Crumble Bars make perfect snacks, and thanks to their not overly sweet flavor, they’re just as perfect for breakfast bars too! These Black & Blueberry Gluten-Free Crumble Bars couldn’t be more fitting for spring and summer. Now, who wants a gluten-free, vegan, refined sugar-free, dairy-free, and clean-eating snack bar that’s also totally yummy and easy to make?!