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["Combine the flour, sugar, and salt in a food processor. Add the butter and pulse until the mixture begins to form a crumbly, curdy-not cohesive-dough. Process more for big clumps and less for a pebbly, sandy texture. (You can also do this step in a bowl with your hands!)", "Dump onto a plate and continue to squeeze and break-apart the mixture until it looks right to you. (Streusel is very personal. Don't let anyone tell you otherwise!) Refrigerate for a few hours or freeze for 30-ish minutes until firm. (This will reinforce the streusel's crumby personality.) Bag and store in the fridge for up to five days or in the freezer for up to 2 months.", "Put it to good use! Mound 1 to 1 1/2 cups on top of a pie before baking. For cake, follow your pan size and your heart, but figure a very thick layer of streusel in the middle and on top. The more, I say, the better.