Swirly Coffee Cake with Greek Yogurt

Here is a coffee cake that you will just adore! It is almost dense enough to be considered pound cake. One of the best parts of this recipe is you can make it ahead of time. A great coffee cake for breakfast or brunch. Ina Garten, the Barefoot Contessa, thanks for another great recipe!

I have tried this recipe before and the dough smelled wonderful! However, I didn't have the proper pan. Using the right pan actually does make a difference. I had used a glass 9x9 baking pan, but the cake is so dense that the middle did not cook in time for the edges to not dry out.

I did make some changes to the recipe. I used 3 large eggs instead of 3 extra large eggs, equal quantity of Greek yogurt instead of sour cream, all purpose flour instead of cake flour, and I semi doubled the streusel topping. I say semi doubled because I didn't think it needed that much extra butter or flour.

Next time I would put more streusel in the middle so it would have a nice swirly line. I used about 1/2 cup I think. I would use closer to a full cup. Its coffee cake! Live a little! :)

I would also consider making it without the streusel and using blueberries and lemon or raspberries in the cake.

Update: 5/28, made this using the sour cream. This was a softer cake compared to the more pound cake texture the Greek yogurt cake. What would I make next time? I don't think you can go wrong either way!

Layer 1

Top layer! I almost forgot to take a picture haha

updated 10/13/2015: This is one of my new baking pans and we have a new camera that I wanted to try out! Below, I halved the amount of cake and kept the amount of streusel the same, delish!

Swirly Coffee Cake

For the cake:

1 1/2 sticks unsalted butter at room temperature
1 1/2 cups granulated sugar
3 large eggs at room temperature
1 1/2 teaspoons pure vanilla extract
1 1/4 cups plain Greek yogurt or Sour Cream
2 1/2 cups all purpose flour

2 teaspoons baking powder
1/2 teaspoon baking soda
1/2 teaspoon kosher salt

For the streusel: (this is doubled already!)
1/2 cup light brown sugar, packed
3/4 cup all-purpose flour
3 teaspoons ground cinnamon
1/4 teaspoon kosher salt
5 tablespoons cold unsalted butter, cut into pieces
1 1/2 cup chopped walnuts, optional

Preheat the oven to 350 degrees F. Grease and flour a 10-inch pan that has the hole in the middle.

Cream the butter and sugar in the mixer with the paddle attachment for 4 to 5 minutes, until light.

Add the eggs 1 at a time, and then add the vanilla and Greek yogurt.

In a separate bowl, combine flour, baking powder, baking soda, and salt.

With the mixer on low, add the flour mixture to the batter until just combined. Finish stirring with a spatula to be sure the batter is completely mixed.

For the streusel, combine brown sugar, flour, cinnamon, salt, and butter in your food processor (or in a bowl and mix with your fingers) until it forms a crumble. Mix in walnuts, if desired. 

Pour half the batter into the bottom of the pan, layer with streusel, top with the rest of batter and remaining streusel.

Cook 50-60 minutes or until cake tester comes out clean. Let cool before removing from pan. Serve at room temperature.