Preheat oven to 350. Line a baking sheet with parchment paper.
Mix together the cookie ingredients. Scoop 12 large balls with a large cookie scoop. Flatten into circles.
Bake for 15 minutes until the edges are golden brown. Cool completely.
Flip over half the cookies and divide the jam between them. Top with a second cookie.
Melt the remaining white chocolate. Dip each sandwich cookie into the chocolate so it is half covered. Set onto a waxed paper-lined tray and place into the fridge to set the chocolate.
Notes
Nutrition: This makes 6 large sandwich cookies. You can make 12 smaller cookies if you like by using a small cookie scoop and making 24 cookies. Sandwich them with jam as directed to have 12 cookies.