Step 1

Set oven to 400 F.

Step 2

Wash the sweet potatoes under cold water to remove any dirt. Pierce the potatoes with a fork or sharp knife to create a few holes. Place the sweet potatoes on a baking sheet.

Step 3

Cut the ends off the end of a plantain and, using a sharp knife, slice the skin lengthwise down the middle in order to peel it. Halve and place the plantains on the same baking sheet with the sweet potatoes and roast in the oven.

Step 4

Bake the plantains for about 25 to 30 minutes and then remove from the oven. Allow the sweet potatoes to continue to cook for about 45 minutes or 1 hour, until they are soft, then remove from the oven.

Step 5

Allow the sweet potatoes to cool slightly before handling, then chop off the ends and peel the skin off. Chop up the sweet potatoes and plantains and place in a large bowl along with 3 tablespoons butter, almond milk, 1/3 cup coconut sugar, salt and cinnamon. Mash and stir until fluffy and to your desired consistency. If you need it to be thinner, add more milk.

Step 6

Place the mash in a casserole dish. Melt the remaining tablespoon butter and drizzle over the mash along with the remaining tablespoon sugar. Roast for an additional 8 to 10 minutes, and broil the final 1 to 2 minutes to caramelize the topping.