Preheat the steamer by bringing the water in the steamer to a boil over medium-high heat. Cover the lid with a kitchen towel to catch the condensation.
Grease a 9-inch/22.5cm bundt pan with butter or margarine.
In a small bowl, combine vegetable oil and coconut cream. Set aside.
With a hand mixer or a stand mixer with a whisk attachment, combine eggs, sugar, vanilla extract, and ovalette. Beat on high speed until white and fluffy.
Sift in black glutinous rice flour, baking powder, and salt into the egg mixture. Fold the mixture with a spatula until well combined. Pour in the oil and coconut cream mixture. Fold the mixture until well combined. Make sure to scrape the bottom during mixing and don't overmix or you will lose the air you have incorporated during the egg whipping.
Pour the batter into the prepared pan. Level the top with the spatula. Tap the pan on the counter to release the air bubbles.
Steam for 30-35 minutes or until a toothpick inserted into the center of each one comes out clean.
Let the cake cools in the pan for 10-15 minutes. Take the cake out of the pan by placing the wire rack on top and flipping it over. Let it cool completely before serving.
Notes
Make sure to bring all the ingredients to room temperature before making this recipe. Room temperature ingredients will mix better and rise more easily.If you can't find ready-made black glutinous rice flour, you can make your own by blending black glutinous rice grain in a food processor or coffee grinder into powder.