1. For the streusel, don’t mix it too much that it becomes a paste rather than crumbs. The large crumb size should be about half a pea.
2. I use a stand mixer fitted with the paddle attachment for this recipe but the instructions should also work if you want to make this by hand with a whisk or with an electric hand mixer.
3. Store in an airtight container on the counter for up to 3 days.