In a medium bowl mix beans and prepared mashed potatoes until combined.
Line a baking sheet and add small scoops of the mashed potato mixture in rows.
Make around 5 rows, 3-4 across.
Then press down lightly to flatten. They will not expand when baking.
Bake for 20-25 minutes until golden and crispy.
Serve warm as prank "chocolate chip cookies".
Notes
Notes: I recommend cheesy potatoes so you get the appropriate light brown colored cookie look. If you use regular mashed potatoes add a few drops of yellow food coloring.