Preheat the oven: Preheat the oven to 350°F. Line a baking sheet with parchment paper and brush a thin layer of olive oil on top.
Mix the ingredients: Add the flax seeds, sunflower seeds, pumpkin seeds, hemp seeds, salt, and water to a bowl. Stir to combine. If you’re adding seasonings, mix them in now (or keep it simple with just a pinch of salt). Let the mixture sit for 10–15 minutes to allow the flax seeds to gel and bind everything together, stirring every 5 minutes or so.
Spread onto the baking sheet: Line a baking sheet with parchment paper and lightly brush with olive oil. Evenly spread the mixture into a thin layer that covers the surface of the pan. The thinner you spread it, the crispier your flax seed crackers will be. Lightly brush the top with more olive oil.
Bake until crisp: Bake for 25-35 minutes, or until firm and lightly golden around the edges.
Cool and snap: Remove from the oven and let cool completely (this is when they crisp up even more). Once cooled, snap into crackers and enjoy!
Notes
Spread the mixture evenly and thinly. The thinner you spread the seed mixture, the crispier your flax seed crackers will be.
Don’t skip the cooling step. The crackers continue to crisp up as they cool, so let them cool completely before breaking.
Customize the flavor. Add everything but the bagel seasoning, garlic powder, rosemary, or chili flakes for some extra flavor.