Found here, these are tasty and fairly easy to make!
Recipe adapted from Food Network
1 1/4 cups graham crackers, finely crushed
1 cup flour
1 1/2 tsp baking powder
1 stick (1/2 cup) unsalted butter, softened
1/2 cup packed brown sugar
1 egg, separated
3 ounces cream cheese, softened
1/4 cup white sugar
1/2 tsp vanilla
2 tsp lemon zest
Preheat the oven to 350 degrees F.
For the Cookies :
1. In a medium bowl, combine graham cracker crumbs, flour, and baking powder.
2. In a large bowl, beat butter and brown sugar with a mixer until creamy.
3. Beat in egg white. Add dry ingredients a little at a time, blending until just combined.
For the filling:
4. In a medium bowl, beat the cream cheese and white sugar until creamy. Add egg yolk, lemon zest, and vanilla and beat until well combined.
5. Scoop two tablespoons of the graham cracker cookie dough into your hand and shape into a ball.
6. Place on a parchment paper lined baking sheet. Press your thumb into the center of each ball to flatten out and make a small well for the filling to go in. Spoon a dollop of the cream cheese filling into each thumb print.
7. Bake approximately 12-15 minutes or until cookies are golden brown and filling is just set. Let cool completely.