Preheat your oven to 350 degrees.
Empty the cake mix into a mixing bowl and add the eggs and oil.*
Stir (or mix with a mixer) until blended.
Add the mini chocolate chips.
Using two small spoons, measure out and shape each cookie into a small ball and place on a parchment lined baking sheet.
Add three mini marshmallows to the top of each cookie, pushing them lightly into the raw dough.
Bake for 8-9 minutes. Be careful not to overcook and burn the cookie!
Remove and allow to cool for a minute until removing the cookies to a wire rack to completely cool.
Store in an air-tight container; separate cookie layers with wax paper to avoid sticking.
To Package For a Gift
Pour the cake mix into a clean and dry wide-mouth canning jar, gently packing the mix down.
Next, add the mini chocolate chips in an even layer on top of the cake mix.
Pack the mini marshmallows into a snack-sized ziplock bag, removing as much air as possible before sealing the bag.
Fold the bag and add it to the jar.
Seal with the lid.