Shamrock Cookies

Ingredients

• 1/2, cups ,spinach, coarsely chopped
• 1, tbsp ,lemon juice
• 1/8, cup ,water
• 170, g ,butter, unsalted, room temp
• 150, g ,white sugar
• 1/2, bean ,vanilla bean, scraped
• 2, tsp ,vanilla bean extract
• 1, lg ,egg
• 2 1/4, cups ,Frankie's gluten-free all-purpose flour blend
• 1/2, tsp ,baking powder
• 1/4, tsp ,Kosher salt
• 170, g ,butter, unsalted, softened
• 360, g ,powdered sugar
• 1 1/2, tsp ,vanilla extract
• 3, tbsp ,heavy cream
• 2, tsp ,spinach dye, or more if needed.