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Export 11 ingredients for grocery delivery
Step 1
Preheat oven to 350°F. Line two baking sheets with parchment paper or silicone baking mats.
Step 2
Whisk together flour, baking soda, baking powder and salt in a bowl. Stir together buttermilk, vanilla and lemon zest in a small bowl.
Step 3
Beat together butter and sugar in a large bowl with an electric mixer or a stand mixer fitted with whisk attachment until pale and fluffy, about 3 minutes. Add egg and mix again until well combined.
Step 4
Alternate adding flour and buttermilk mixture on a low speed until batter is well combined and smooth.
Step 5
Using a cookie scoop, place batter about 2 inches apart on cookie sheet. Dipping your pointer finger in water, smooth the edges of each cookie. (This step is optional, but will ensure a slightly more even shape).
Step 6
Bake 15-17 minutes, until tops are puffed and golden.
Step 7
Remove cookies from sheet and place on cooling rack to cool for at least 1 hour before icing.
Step 8
To make icing: whisk together confectioners sugar, corn syrup, vanilla, and 2 Tbsp milk in a small bowl until smooth. Transfer half of icing to another bowl and stir in cocoa, adding more milk, 1 tsp at a time, until consistency is the same as white icing.
Step 9
Turn cookies upside down. Place icing scraper tool (or parchment paper) over half of each cookie and spread the uncovered halves with white frosting using a small offset spatula. Allow to set 10-15 minutes. When icing has set, frost the other side of the cookies with chocolate icing. Yes, you should start with the white icing.
Step 10
Allow to set another 10-15 minutes until serving.
Step 11
Store in an airtight container for 2-3 days.