Cook coconut cream over medium heat. Once thickened, lower to medium-low and stir occasionally, scraping the pan. Cook until the oil separates and the curds turn golden. Strain, saving the latik and oil.
Line a platter with clean banana leaves, if using. Brush lightly with latik oil.
In a nonstick pan, mix coconut milk, glutinous rice flour, mashed ube, brown sugar, vanilla, ube extract, and salt until mostly smooth.
Cook over medium heat, whisking for about 5 minutes, until thickened. Switch to a sturdy spatula and lower to medium-low. Stir, spread, and fold the mixture for about 30 minutes, scraping the bottom and sides.
Mix in 2–3 tablespoons latik oil until smooth and glossy. It’s ready when very thick and sticky and holds its shape when cut through with the spatula.
Spread on the prepared platter while warm. Top with latik and cut into squares or diamonds. Serve warm or at room temperature.