Clean and hull the strawberries, then juice the lemon. Measure out the açai powder, maple syrup (or agave), and water.
In a blender, combine the strawberries, açai powder, lemon juice, maple syrup (or agave), and 2 cups of water. Blend until smooth.
Pour the blended mixture into the Ninja Creami pint. Place it in the freezer for at least 4 hours or overnight until fully frozen.
Once frozen, remove the pint from the freezer and place it in the Ninja Creami machine. Select the "Smoothie" or "Sorbet" function to process the mixture until it’s creamy and smooth.
If the mixture is too thick, add the remaining 1 cup of water and reprocess the mixture to achieve your desired consistency.
Once processed, serve the refresher immediately in glasses. Garnish with extra fruit or mint for added freshness. Enjoy!