1. If it ain’t broke…

If you use your grandma’s beat-up old aluminum pan (or a brand new top-of-the-line model), and your Bundt cakes ALWAYS come out of the pan with nary a crumb out of place — thank your lucky stars! Read the rest of this post if you feel like having a self-satisfied chuckle, but don’t change a thing in your Bundt-baking routine.

2. Use a non-stick pan — preferably one in good shape

Non-stick pans are the perfect solution to the inherent challenges in a Bundt cake’s intricate design. But beware the older non-stick pan: a scratched, worn non-stick surface may no longer be slick enough to release your cake flawlessly.

3. Grease the pan thoroughly

Use non-stick vegetable oil spray or melted shortening — not butter. The milk solids in butter can act like glue, encouraging cake batter to stick to the pan. (You always butter your pan, and your cake never sticks? See tip #1, above).

4. Grease the pan just prior to adding the batter

Most recipes start out, “Preheat your oven. Grease your pan…” We’ve found that greasing a non-stick Bundt pan too far ahead of time allows the oil to slide down the inside of the pan and pool in the bottom.

5. Don’t flour the pan; but do coat it

If you’re using a non-stick pan and still having trouble with sticking Bundts, try sprinkling a coating of either finely ground nut flour (e.g. almond flour ) or granulated sugar into the greased pan before adding the batter. Either will provide a barrier between batter and pan — which is what you’re seeking.
“But isn’t sugar sticky?” Yes, it becomes sticky as it cools; and it can act like glue when fully cooled. But while warm, sugar is still semi-liquid, and your sugar-coated cake should slide right out of the pan.
What about flour?
Not only does flour sometimes provide a less-than-satisfactory non-stick experience, it also adds a dry layer of “gunk” to the cake’s surface. I prefer either sugar or finely ground nuts (nut flour).

6. Loosen the edges of the cake when you remove it from the oven

A bit of gentle poking with a table knife or thin heatproof spatula is all you need to do. Carefully slide the knife or spatula down the sides of the pan as far as you can, to release any sticking spots.

7.Don’t forget the tube 

Sometimes your cake may rise up and over the tube, which will effectively block it from releasing from the pan. Either cut away any extra cake that’s encroached on the tube; or gently push it back with your fingers. You want the entire top surface of the tube to show.

8. Let the hot cake rest for a few minutes

If your cake breaks when you turn it out of the pan, you could be misinterpreting the cause. Some cakes are extremely fragile right out of the oven; even if they don’t stick to the pan, the simple act of moving them from pan to rack causes a fracture.

I like to let my Bundt cakes rest for about 5 minutes right side up; then for another 5 minutes upside down on a rack. Sometimes the cake drops out of the pan as soon as I turn the pan onto the rack. Sometimes it needs a little help — read on.

9. Give your Bundt a gentle nudge

If you’ve turned the pan over, waited, and the cake hasn’t dropped out of the pan onto the rack, give it a few gentle side-to-side jiggles. This small motion is often enough to release it.

10. If all else fails…

Return your cake to the cooling (but still warm) oven for about 10 minutes. Often this mild heat is just enough to soften and release any baked-on areas clinging to the sides of the pan.