To make this Pumpkin Honey Bun Cake gluten-free. Swap out the yellow cake mix. For a gluten-free cake mix. Most brands offer a great gluten-free version. That bakes up just as moist and fluffy. Ensure the other ingredients. Like the pumpkin puree and spices. Are naturally gluten-free. Which they typically are. The best part? No one will even notice it’s gluten-free—it’s that delicious! Just make sure to double-check your baking powder. Is gluten-free as well.