Rhubarb Wafer Cookies

Ingredients

• 1 cup butter (room temperature)
• 2 cups flour
• ⅓ cup heavy whipping cream (room temperature)
• 1 cup finely chopped rhubarb
• 2 tbsp lemon juice
• 2 tsp lemon zest
• ¼ cup sugar
• 2 tsp cornstarch
• 1 tsp salt
• ¼ cup butter (room temperature)
• 1 cup powdered sugar
• 1 tsp vanilla extract