Whisk together flour, baking powder, baking soda, and salt. Set aside.
In a large bowl, or a stand mixer bowl, beat the sugar with the lemon zest for 1-2 minutes.
Add the vegetable oil and continue beating until combined.
Beat in egg.
Stir in the vanilla extract and lemon juice.
Stir in the flour mixture, stirring until all the flour is combined.
Cover and refrigerate at least 3 hours and up to 24 hours.
Preheat oven to 325℉ and line cookie sheets with parchment paper.
Combine the two sugars together for rolling the cookie dough in.
Scoop the dough into 1-inch balls.
Roll the dough balls in the sugars.
Place dough balls on the cookie sheets, about 2 inches apart.
Bake 11-13 minutes or until edges are baked and the centres are just slightly wet.
Let cool on the pan for 2 minutes, then transfer to a wire rack to finish cooling.
Store in an airtight container at room temperature for up to 5 days.