My father-in-law is obsessed with these 5-ingredient cookies whenever he’s over the house!

Combine Ingredients: In a large bowl, whisk cake mix and cinnamon. Add oil and eggs. Mix until well combined.
Chill Dough: Cover the dough and refrigerate for a few hours.
Preheat Oven: Heat oven to 350°F.
Prepare Baking Sheets: Line sheets with parchment paper.
Shape Cookies: Roll dough into 1 tablespoon balls. Coat each in powdered sugar.
Bake Cookies: Place on baking sheets. Bake for 10 minutes or so.
Cool: Allow to cool on sheets, then transfer to wire racks.
Enjoy these easy and delicious Cinnamon Crinkle Cookies as a sweet end to a meal or as a snack any time of day.