Cookie Sidik Jari

Bahan-bahan (16 porsi)

• 8 Tbsp salted butter (room temperature, $1.00)
• 1/3 cup granulated sugar ($0.11)
• 1 large egg, separated ($0.21)
• 1/4 tsp vanilla extract ($0.14)
• 1 cup all-purpose flour ($0.12)
• 1/4 tsp salt ($0.02)
• 1 cup sweetened coconut ($0.83)
• 8 tsp fruit jam ($0.26)