Want to make this cake gluten-free? No problem! Just swap out the regular spice cake mix for a gluten-free spice cake mix (most grocery stores carry them these days). Everything else in the recipe is naturally gluten-free, so you won’t need to adjust much. Just make sure to double-check that your caramel sundae topping and toffee bits are labeled gluten-free, as sometimes hidden gluten sneaks in. With this simple swap, you’ll still get all the same delicious, moist cake goodness—without the gluten!