1. Prep & Preheat
Preheat oven to 350°F (175°C). Grease a 9x13-inch baking pan.
2. Make the Cake Batter
In a bowl, mix cake mix, sour cream, water, oil, eggs, and vanilla until smooth.
3. Layer the Swirl
Pour half the batter into the pan.
Mix brown sugar, cinnamon, and nuts (if using), then sprinkle over batter.
Top with remaining batter and swirl lightly with a knife.
4. Add Crumb Topping
In a small bowl, combine flour, sugars, and cinnamon.
Cut in cold butter until crumbly. Sprinkle over batter.
5. Bake & Glaze
Bake 30–35 minutes until a toothpick comes out clean.
Cool 10 minutes, then drizzle with glaze (if using).
Pro Tips
🔥 Extra moist – Substitute applesauce for half the oil.
⏳ Make ahead – Bake the night before; glaze before serving.
🍎 Add fruit – Layer thin apple slices with the cinnamon swirl.
Serving Ideas
With coffee or tea – The perfect pairing!
Brunch spread – Next to scrambled eggs and fruit
Dessert – Warm with a scoop of vanilla ice cream
FAQ
Q: Can I use a different cake mix?
A: Yes! Spice cake or white cake mix works great too.
Q: How do I store leftovers?
A: Cover and keep at room temp 3 days or freeze 1 month.
Q: Can I make this without eggs?
A: Try flax eggs (1 tbsp flaxseed + 3 tbsp water = 1 egg).
