A box cake mix (or equivalent homemade cake mix)
All ingredients listed on the back of the box. (ex. eggs, water)
A mixing bowl
A hand mixer/egg beater (or you can mix by hand)
Several soup-sized bowls (one for each color!) - I suggest 4-6 bowls and colors for best result, but you can choose whatever you like!
Food dye
Spoons to mix the dyed batter
1/4 cup measuring cup/spoon 
Cooking spray
Mason jars, glass baking dish, or other glass oven-safe cookware to bake cakes in
*If you are baking in jars, you will also need a glass cake pan ready that all the jars can stand inside
# of mason jars advisement:
My suggestion is to use 5 of the 8 oz jars, or 3 of the 16 oz jars.
An oven and oven mitts
Optional:
Cake frosting, sprinkles, candy corn (if you want a unicorn horn!), or any other cake toppings - have fun with it!

Learners will not need to use any apps or websites beyond the standard Outschool tools.

Please be advised that this class will require the use of an oven. Parent supervision is recommended for any students who are younger or inexperienced using the oven. 
Please be sure to check all ingredients you are using for allergens before using them for this class.