Preheat oven to 350 degrees. Line baking sheets with parchment paper. In medium bowl, sift together flour blend, baking powder, baking soda and salt. Set aside. In bowl of stand mixer, beat together sugar, powdered sugar, coconut oil and lemon zest for 2 minutes, until creamy. Add lemon juice, coconut milk and vanilla. Continue to beat another 1-2 minutes. Add flour mixture and mix until combined.