Use bananas with brown spots and slightly blackened skin for maximum sweetness and moisture, reducing the need for added sugar while ensuring tender, fluffy donuts.

Mix 1 tablespoon ground flaxseed with 3 tablespoons water and let sit for 5 minutes before adding to batter—this ensures proper binding and structure in your egg-free donuts.

Fold ingredients together until just combined to prevent gluten development, which would result in dense, tough donuts instead of the light, fluffy texture you're aiming for.

Use a piping bag to fill your donut molds evenly, which prevents air pockets and ensures consistent baking times and uniform texture throughout all your donuts.

Allow donuts to cool for 10-15 minutes on the rack before glazing or coating—warm donuts will absorb toppings unevenly and become soggy instead of maintaining their tender crumb.