1Grease a pie dish or cake pan with canola oil.
2Add 1 1/2 inches of water to a large pot (with a steamer rack), and bring to a boil.
3Measure 3/4 cup of water and pour into a microwave safe bowl. Add the brown sugar, and microwave for 1 minute until the sugar is dissolved.
4Pour the sweet rice flour into a large bowl, and add the brown sugar, the remaining 3/4 cup of water, 2 tablespoons of canola oil, and the vanilla extract.
5Stir to combine until smooth.
6Set the cake inside the pot and steam for 1 1/2 hours.
7Check the water level periodically and replenish if needed.
8Allow the cake to cool completely and cover with plastic wrap or serve immediately.