01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper.
02 - In a large bowl, whisk together melted coconut oil and sugar until smooth. Add almond milk, lemon juice, lemon zest, and vanilla extract. Whisk until well combined.
03 - In a separate bowl, mix together flour, baking powder, baking soda, and salt until evenly blended.
04 - Gradually add dry ingredients to wet ingredients, stirring just until a dough forms. Be careful not to overmix.
05 - Gently fold in chopped blackberries, being careful not to crush them excessively.
06 - Scoop tablespoons of dough onto prepared baking sheets, spacing them about 2 inches apart.
07 - Bake for 12-14 minutes, or until edges are set and lightly golden.
08 - Let cookies cool on baking sheet for 5 minutes, then transfer to wire rack to cool completely.
09 - If desired, whisk together powdered sugar and lemon juice to make glaze. Drizzle over cooled cookies and allow to set before serving.