• 1/2 cup butter softened
• 1/3 cup granulated sugar
• 1/4 cup powdered sugar extra for dusting the cookies
• 1 tsp lemon zest
• 1 egg at room temperature
• 1 tbsp lemon juice
• 1/2 tsp lemon extract
• 1 & 1/2 cup all purpose flour
• 1/4 tsp salt
• 1 tsp baking powder
• 1 Tbsp poppy seeds Optional (the crumbl one had them in the cookie dough but I forgot to add them in in the photo)

Blackberry frosting

• 3 oz cream cheese softened
• 3 tbsp butter
• 1 tbsp blackberries fresh, mashed, and strained in a sieve to remove the seeds
• 1 & 1/4 cup powdered sugar
• 1/4 tsp lemon zest
• 1/4 tsp vanilla extract
• 1/4 cup blackberry jam homemade or store-bought