(2 sticks, or 224 g) unsalted butter at room temperature • (3.5 ounces, or 100 g) white sugar • vanilla extract • salt • (12.5 oz, or 354 g) all purpose flour • seedless raspberry jam • apricot jam • fresh lemon juice (divided; see below) • ground cardamom (for adding to the apricot jam) • powdered sugar • hot water (or you can use 2 teaspoons hot water plus 1 teaspoon lemon juice)