For black and white rice bibingka and puto bumbong, it is important to use glutinous black rice. There are non-glutinous black rice which I am not recommending because they don't have the same consistency as glutinous and take forever to cook.
For the suman, you can add a variety of flavors after boiling the glutinous rice in coconut milk and sugar. Fresh grated ginger is extra yummy paired with a mug of hot cocoa, chai, or jasmine tea. Another delicious flavor is the combination of chopped peanuts and chocolate, adding either grated dark chocolate or dark cocoa powder. Wrap in banana leaves and steam for 30 minutes.
Black And White Layered Bibingka
1 cup black glutinous rice
1 cup white glutinous rice
3 cups water, halved½ cup sugar, halved
2 cups coconut milk, halved
Preheat oven to 350°F. Line an 8-inch round or square pan with banana leaves, set aside.
Cook the rice in 2 separate non-stick saucepans: Heat 1½ cups water, then add each of the rice. Let come to a full boil, lower the heat, cover, and simmer for 30 minutes. Stir in the coconut milk, sugar, and a pinch of salt and cook for 1 minute more. Spread the cooked black rice evenly on the lined pan. Spread the cooked white rice evenly on top of the black rice. Spread coconut jam all over the rice.
Bake for 30 minutes. Transfer the pan on the upper rack, turn on the broiler, and broil for a few minutes until jam is bubbly and browned. Do not let burn. Cool before slicing.