01 - Preheat oven to 350°F and line two baking sheets with parchment paper.
02 - Whisk together flour, baking powder, baking soda, and salt in a large bowl.
03 - Combine sugar, melted coconut oil, non-dairy milk, lemon juice, lemon zest, and vanilla extract in a separate bowl until smooth.
04 - Add wet ingredients to dry ingredients and stir until just combined. Avoid overmixing to prevent tough cookies.
05 - Gently fold in blueberries, taking care not to crush them.
06 - Scoop tablespoon-sized portions of dough and roll into balls. Lightly roll each ball in granulated sugar and place on prepared baking sheets 2 inches apart.
07 - Press each cookie slightly flat with fingers or the bottom of a glass.
08 - Bake for 11 to 13 minutes until edges are set and tops appear dry.
09 - Let cookies rest on baking sheet for 5 minutes before transferring to wire rack to cool completely.