Preheat the oven to 350F / 175C. Line a baking sheet with parchment paper.
Blend Medjool dates and nut butter until a paste forms. Then add the remaining ingredients and blend again. Add a little more carbonated water if needed, 1 tablespoon at a time. It will form a thick smooth and sticky batter.
Spoon 12 evenly-sized cookies onto the baking sheet, and be sure to smooth and flatten any peaks. Bake for 15 minutes.
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