Pure your berries of choice in a high speed blender until super smooth (I love doing 2 parts strawberries 1 part raspberries!). Sieve out the seeds from your fruit puree.

Spread 1 cup of smooth berry pure per baking tray (half sheet size) as evenly as you can, without leaving translucent streaks. I prefer to use a baking mat for smoother results, but lining the tray with parchment paper works great too. And you can always mix different berry flavors in the same tray!

Dehydrate in your oven at the lowest possible temperature (140-170°F/60-75°C) for 3-4 hours until the center is just no longer sticky to touch. If your oven is old school, you can always leave the door slightly ajar. As a good rule, check in every 30 minutes the first time you whip them up. And you can always dehydrate 2-3 trays at the same time.

Peel off the fruit leather gently off the baking mat and cut in desired shape. It's possible that the texture feels a little dry, but keep in mind that it will become sticky overnight, so you'll want to roll up the pieces using parchment or wax paper to keep it from sticking. And if you baked on parchment, just cut up the strips along with the paper. The edges can be a little dry, so just trim them off and enjoy as 'fruit chips!'.

Store in an airtight container in a cool place (or the fridge) for about a week, and in the freezer for a few months.