An unexpected use for cake mix — cake streusel
Cake mix + melted butter = a crispy, crunchy cake addition.

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Last spring, I baked a wedding cake for two good friends. Before settling on a flavor, I held a taste test for them so they could try all the frosting, filling, and cake elements they could choose from: white chocolate Swiss buttercream, fudgy bittersweet chocolate ganache, dreamy whipped caramel, cloud-like diplomat cream, and much more.
“Okay, but what are these?” asked the groom, and took another huge bite of cake.
Of everything, what had stood out the most was the chocolate “cake streusel” I’d sprinkled atop the cake for extra crunch and flavor.
It’s a technique I picked up from Christina Tosi’s seminal All About Cake years ago and have been using in my cakes ever since. It’s simple: Just mix boxed cake mix with melted butter until clusters of crumbs form, like making streusel, then bake the crumbs until crunchy.
Christina employs this method specifically for yellow cake crumbs, but I’ve used it with cake mixes of all flavors: vanilla, chocolate, red velvet, and more. Our Deliciously Simple Chocolate Cake Mix and Golden Yellow Cake Mix are both perfect for this — after testing several different brands, I found that these mixes have the best flavor because of their clean, simple ingredient lists (basically just flour, sugar, baking powder, etc.), which translates to better-tasting streusel. The chocolate cake mix has a deep, dark chocolate flavor that tastes almost like a pan of rich, fudgy brownies. The yellow cake, meanwhile, has ample vanilla notes and a hint of almond extract, so the crumbs taste unequivocally like a classic birthday cake. Combined with melted butter, the crumbs make for a sugary, buttery bite of concentrated cake flavor. And bonus: This method also works well with our gluten-free cake mixes.
I love using cake streusel for two reasons. For one, it’s an excellent way to add an extra textural dimension to cakes, providing some crunch to contrast with all the soft and creamy elements throughout. To add, you can sprinkle the streusel atop fillings in between cake layers, where they may soften a bit but still retain nice texture. Also, it’s a super-easy way to decorate the top of a frosted cake without much time, precision, or skill required — I simply sprinkle the streusel in a ring around the top of the cake.
Combine 2 cups (290g) cake mix with 4 to 6 tablespoons (60 to 90g) melted butter. Mix by hand to form soft crumbles (similar to making streusel). Start with the lower amount of butter, and add more as needed to form clumps no larger than the size of almonds. Note: This method is quite flexible; you can typically add melted butter to any amount of cake mix a tablespoon at a time until clumps form.
Spread the crumb mixture in an even layer on a parchment-lined baking sheet, and bake at 300°F for 15 to 20 minutes, until mostly crispy. The crumbs will continue to harden as they cool, so it’s OK if they’re still a bit soft when you remove from the oven.
As a bonus, cake streusel freezes beautifully, so you can prep a big batch and keep it in your freezer to pull out whenever you need to fill or decorate a cake. These crisp crumbs would also be wonderful sprinkled on other desserts: ice cream sundaes, chocolate pudding, or even a creamy frozen pie. But be careful: A handful of crunchy cake streusel straight from the freezer is also an irresistible snack, something I’ve learned the hard way.
Thankfully, it’s always easy to make more.
Pick up a box of cake mix for your next celebration, whether you’re making cake, cake streusel, or both.
Cover photo by Patrick Marinello; food styling by Kaitlin Wayne.
September 8, 2024 at 12:13pm
Love this idea! I am going to try it for sure. I think I am going to try to use it on muffins like someone else suggested. What a great thing that it freezes too!
Thanks so much for keeping us growing on our baking adventure!
September 8, 2024 at 12:44pm
In reply to Love this idea! I am going… by Norma (not verified)
You're very welcome, Norma! Happy baking!
November 15, 2024 at 11:07pm
In reply to Love this idea! I am going… by Norma (not verified)
Do you bake it first before freezing? Or freeze it then bake the crumbles? When removed from the freezer are the crumbles slightly crunchy or do they soften?
November 17, 2024 at 2:34pm
In reply to Do you bake it first before… by Lisa (not verified)
Hi Lisa! You will bake the cake crumbles first...and then when they are cool, you can bag them up and store them in the freezer. They are deliciously crisp and crunchy straight from the freezer. We hope you enjoy using them!
September 8, 2024 at 10:58am
Hi
This sounds terrific! Can it be made with King Arthur's gluten free cake mixes?
Thanks
September 8, 2024 at 11:25am
In reply to Hi This sounds terrific! Can… by Marsha (not verified)
Hi Marsha, yes, this method also works well with our gluten-free cake mixes!
September 5, 2024 at 11:39am
I bet you could use the raw streusel on top of unbaked muffins, just bake it along with your muffins..
September 5, 2024 at 2:12pm
In reply to I bet you could use the raw… by Melinda van sickle (not verified)
What a great suggestion Melinda! We will have to try this as we get into our fall baking (including lots of zucchini and pumpkin muffins). Let us know how it goes if you are able to try it first!
September 15, 2024 at 10:38am
In reply to What a great suggestion… by mperry
Isn’t that how most streusel is baked? On top of the cake before you bake it? That way it becomes an integral part of the cake instead of just sitting on top of it.
September 16, 2024 at 9:39am
In reply to Isn’t that how most streusel… by Sharon Borovay (not verified)
That's right, Sharon, although in this case you might need to make sure that the baking time for the muffins or cake you're topping lines up with the baking time for this type of streusel. Browning and absorption may vary a bit as compared to other streusel toppings.
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