Based on Walmart-only Cheaperfood.

My thinking here is that:

• The flavor comes mostly from the masa, so tastes like tortillas and... tamales.
• If someone handed you some liquidy tamale batter, wouldnt you say "Arent you going to make these? Who eats tamale batter when they could eat tamales? C'mon, it's not like it's cookie dough!"
• But this mixture is more sweet than savory. So is a better match to a Christmas tamale, which uses raisins and cinnamon typically instead of meat.
• So prepare the ingredients like a tamale and cook in a microwave.
• Why a microwave? Because microwaves are good at steaming, and are easier to deal with.

Ingredient changes

• Add cinnamon. 1 teaspoon
• Add raisins 1/2 cup
• Add baking powder to make it fluffier. 1 teaspoon
• See sweet tamale recipe for reference
• Makes 4 tamales

Preparation (1 day's supply)

• see how to prepare tamales, and this forum entry on microwaving tamales. but basically:
• add water to dry ingredients until you have a paste -- should take about 1.5 cups
• dont need to let sit, but you can store in plastic. You can also freeze if you like
• portion out into 4 blobs
• wrap each in a moist papertowel, microwave for ~2 minutes until inside is cooked and separates easily from papertowel

Variations

• to make sweeter, increase raisins to 3/4 cup and add 2 teaspoons of sugar
• could also put meat on the inside just like a real tamale

Muffin variant

• can do in plastic bowl or cup
• use 1/4 of the day's supply of dry ingredients
• add 5/8 cup water and stir
• microwave 2 min 45 sec

See also low-carb variant