
Brighten your day with these sourdough lemon cookie sandwiches! Soft, tangy cookies paired with a creamy lemon filling make this dessert irresistible. Ready in just over an hour!
In a bowl, rub the granulated sugar (¾ cup) with lemon zest. Add butter and beat until light and fluffy. Mix in egg, sourdough starter, vanilla, and lemon juice.
In a separate bowl, whisk flour, salt, and baking soda. Gradually add to the wet mixture, mixing until just combined. Chill dough for 30 minutes.
Preheat oven to 350°F (175°C). Roll dough into 1-inch balls, coat in the remaining sugar, and place on a parchment-lined baking sheet. Bake for 10-12 minutes until edges are set. Cool completely.
For the filling, beat butter, cream cheese, and lemon zest until smooth. Gradually add powdered sugar and lemon juice, beating until creamy.
Spread or pipe the filling onto the flat side of half the cookies, then sandwich with the remaining cookies.