Step 1

To prepare the dough: Start by dissolving the yeast in the warm milk along with 1 tsp sugar. If you do not have a thermometer, the milk should be warm to the touch but not hot. Whisk the yeast and 1 tsp sugar into the milk to dissolve. Over the next few minutes, the milk/yeast mixture should become foamy as the yeast begins to grow. If it doesn't, this likely means that your yeast has expired or the milk was too hot, causing it to die. Get some fresh yeast and try again, otherwise your babka won't rise... and that would be a major bummer.

Step 2

While the yeast proofs, cream together the butter and sugar in a stand mixer fit with the paddle attachment.

Step 3

Once the butter and sugar are well combined, add the oil and vanilla extract and mix well at low speed. Add egg yolks 1 at a time and increase the mixer to high. Beat for an additional 2 minutes.

Step 4

Turn the mixer back to low speed and add 2 1/2 cups flour and 1 tsp salt, then add the foamy yeast mixture. Be sure to give the yeast mixture a final whisk before adding it in, especially if it is very foamy.

Step 5

Mix until just combined, then replace the paddle attachment with the dough hook. Continue to mix, adding 1 tbsp of flour at a time, just until a soft dough forms. The amount of flour you need will vary based on humidity levels; best to add flour slowly and check texture as you go.You want a dough that is soft a pliable, not stiff. The dough should be tacky, but not wet or sticky, and shouldn't cling to the skin. Do not walk away during this part, you also want to keep an eye on the dough to make sure that you do not over mix it. It should be easy to form into a smooth ball.

Step 6

Once a soft dough forms that can easily be removed from the hook by hand, transfer it to a lightly floured surface and knead several times, or until you have a smooth ball of dough. Do not over-knead.

Step 7

Place the ball of dough into a greased mixing bowl and cover with plastic wrap. I prefer to let the dough rise in the refrigerator overnight, but if you prefer you can let it rise at room temperature for 1-2 hours, or until it has just about doubled in size.

Step 8

To prepare the cinnamon filling: Combine all ingredients in a mixing bowl until smooth. Set aside.

Step 9

Remove the dough from the refrigerator and allow to come to room temperature, about 1 hour. Once the dough reaches room temperature, roll it on a lightly floured surface until you have a 14x18 inch rectangle.

Step 10

Evenly spread the cinnamon filling over the dough, leaving an even 1 inch border around the edge.

Step 11

Starting with the long side, roll the dough into a tight log.

Step 12

Roll the log back and forth several times, gently spreading it out until the length of the log is about 20 inches.

Step 13

Twist the dough into a figure 8 and pinch the ends together. Sometimes using a bit of water will help the ends to stick.

Step 14

Line your loaf pan with parchment paper, then lightly spray the parchment with nonstick cooking oil spray. Transfer the dough to the lined loaf pan. Cover the pan with a tea towel, or loosely with plastic wrap, and allow to rise for 1 hour, or until the babka completely fills the pan. It will get pretty big!

Step 15

While the dough is rising, prepare the streusel by combining the ingredients in a mixing bowl until well combined and crumbly.

Step 16

Once the dough has risen, preheat oven to 350 degrees F.Using a very thin skewer, poke a few holes into the babka. This allows steam to be released during baking so that you aren't left with very large gaps between the dough and the filling.

Step 17

Brush the babka with an egg wash made from 1 egg white and 1 tbsp of whole milk.

Step 18

Sprinkle the streusel over the top of the babka. It will collect more in the crevices, but this is fine. Babka should have a rustic look.

Step 19

Place the pan on a baking sheet and bake for 25 minutes, then turn the pan 180 degrees and cook for an additional 25 to 30 minutes, or until it reaches an internal temperature of 185 degrees F in the thickest center part of the babka. The babka will be golden brown and should have a hollow sound when tapped.

Step 20

Allow the babka to cool before slicing. This is truly the hardest part of the whole process, but trust me - cutting into it while it’s still hot will leave you with quite a mess. The filling needs time to set up a bit. Even after cooling it will crumble a bit when you slice it. That's part of the charm. Serve with coffee or tea and enjoy your babka bliss!