Heat the oven to 350F. Line a baking sheet with parchment paper.
In large bowl, whisk flour, baking powder and salt for 30 seconds; set aside.
In food processor, pulse grated zest of 1 Meyer lemon with the sugar until blended and fragrant. Add the coconut oil, 4 tablespoons of Meyer lemon juice, egg and vanilla; mix on low speed until well blended.
Pour wet ingredients and poppy seeds into flour mixture; stir with a rubber spatula until well mixed. Chill dough in the refrigerator for 10 minutes.
Using a 1 ½ tablespoon cookie scoop, drop cookie dough 2-inches apart on prepared baking sheet.
Bake 10 minutes or until edges are golden brown. While cookies are still warm, shape cookies with a round cutter, if desired.
Cool on wire rack.
Make a thick glaze of powdered sugar (1 cup) mixed with Meyer lemon juice (2 tablespoons) and ⅛th teaspoon salt. Drizzle over cooled cookies. Sprinkle with additional grated lemon zest and poppyseeds, if desired.
Notes
Meyer lemons are a bit sweeter and less acidic than regular lemons. Regular lemons or a mix of lemon and orange can be substituted for Meyer lemons.Freeze dough balls in a single layer on a parchment lined baking sheet for less spread or baking for a later time. Store in air-tight container once dough balls are frozen.Nutrition information is for 1 cookie.