– 2 ½ cups all-purpose flour – ¼ teaspoon fine sea salt – 1 cup butter – ⅔ cup + 2 tablespoons sugar – lemon zest from one lemon – ¼ cup seedless raspberry jam – 1 ¼ cup powdered sugar – 2-3 tablespoons lemon juice freshly squeezed – 1 teaspoon pure vanilla extract