Preheat oven to 350. Line a baking sheet with parchment paper.
Mix the cookie ingredients in a food processor or with an electric mixer. Scoop 16 balls with a 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 8 large sandwich cookies. You can make 12 smaller sandwich cookies by using a small cookie scoop and making 24 cookies. Sandwich them with jam as directed to have 12 cookies.