Our oatmeal crumble topping takes 5 minutes to prep and requires just 3 ingredients; oats, brown sugar and vegan butter. It’s the perfect crunchy oatmeal crumble topping for muffins and desserts. There are no complicated steps and all you need is a blender to make this dairy free and vegan topping (you can even make it gluten free). Head to the blog to discover the secrets to achieving the perfect streusel-style crumble topping, and how to keep your crumble topping crunchy.