Puree the mixed berries and erythritol until smooth. Strain out any seeds from the puree using a sieve.

Add parchment paper or a baking mat to a baking tray. Smooth the puree out across the tray as evenly as possible.

Preheat your oven to 140 degrees, or the lowest temperature possible. Bake the fruit for 2-4 hours or until the center of the tray is no longer stick to the touch. If possible, leave the door of your oven slightly open. Check the fruit every 30 minutes while baking.

Peel the fruit leathers gently off the baking tray then cut into the shape you desire. Don’t worry if it feels dry, it will become sticky overnight. Roll up using pieces of parchment or wax paper to prevent the fruit leathers from sticking together. If you used parchment paper to bake you can just cut through the paper.