Preheat oven to 350F. Line a 9x13” pan with foil and spray with cooking spray.
Pulse cookies in food processor until they are a fine crumb. Alternately, you can crush them in a plastic bag using a rolling pin. Mix with 1/4 cup melted butter and press into the bottom of your prepared pan.
Sprinkle nuts evenly over crust.
Whisk eggs, maple syrup, sugar, eggs, remaining butter, and vanilla. Pour over nuts.
Bake for 20-25 minutes, until browned around the edges. Cool completely and slice into bars, leaving the slices close together.
Melt chocolate in a microwave safe bowl. Place melted chocolate in a ziploc bag with the tip cut off and drizzle chocolate over the top of the cut bars. Chill to set and serve.