If you don’t want to make the crumb topping and frosting, you can skip those steps. After the babka has baked and cooled, combine one cup (approximately six ounces) white chocolate chips with one tablespoon vegetable oil in a microwave-safe bowl. Microwave for 30-second intervals, mixing in between with a small spatula, until completely melted and smooth. Drizzle melted white chocolate on top of each babka and allow to set.