Preheat oven to 350 degrees Fahrenheit.

Put all ingredients into an electric mixer fitted with a K hook. Beat together for approximately three to four minutes, until the mixture gets fluffy with a very pale color. Set aside.

In the dirty bowl, with the same K hook, mix the ingredients for the filling.

Mix by hand in a bowl. Start with two tablespoons oil and add more if necessary until crumbs form.

Fill each ramekin approximately 1/4 of the way with cake batter (in a standard ramekin, this will use one large ice cream scoop or two tablespoons of batter).

Add in babka filling until just over halfway (in a standard ramekin, this will use one large ice cream scoop or two tablespoons of filling).

Cover the filling with more cake batter until the ramekin is approximately 3/4 full. (This will use a little less batter than the first layer.)

Top with approximately one tablespoon streusel each.

Bake for approximately 25 minutes until the tops are golden.

Serve warm with vanilla ice cream.