Red Currant Bakery

Preheat the oven to 350 degrees F and place a rack in the center of the oven.
Brown Sugar Streusel
In a medium bowl, whisk together the flour and brown sugar.
Add in the very soft butter and vanilla extract.
Use a fork or your fingers to rub the butter into the flour and sugar until it is fully combined and no dry bits remain.
Set aside.
Mascarpone Layer
In a separate medium mixing bowl, add in the mascarpone, egg yolk, sugar, vanilla, and greek yogurt.
Use a fork or a rubber spatula to mix all of the ingredients until fully combined and then set aside.
Pumpkin Cake Batter
In the bowl of a stand mixer, add in the butter, salt, sugar, vanilla, pumpkin pie spice.
Use the paddle attachment to cream the ingredients on medium speed for 2-3 minutes until fully combined and a little fluffier.
Scrape down the sides of the bowl as needed and add in the eggs. Mix again until smooth. It may look a little curdled, this is ok.
Finally add in the pumpkin and mix once more.
Add in the flour, baking powder, baking soda, and mix briefly until just combined.
Line a 9" springform pan with parchment paper or grease with a baking spray. If you don't have a springform pan, a standard cake pan will work as well.
Pour the pumpkin batter into the lined pan.
Assemble and Bake the Pumpkin Cake
Scoop the mascarpone filling onto the cake batter, ideally somewhat spread out around the edges.
Use the back of a spoon or spatula to carefully spread the filling across the batter without mixing in the batter.
Sprinkle the top with all of the streusel.
Bake the cake in the preheated oven for 35 minutes. Then, rotate the cake 180 degrees and bake for another 35-40 minutes or until golden brown and the cake only has a slight wobble in the center when bumbed.
Once the cake is finished baking, let it cool for 10 minutes before running a knife along the edge of the cake to loosen it from the pan. Release the spring form and remove the cake from the pan to cool for at least 30 minutes before serving.
Optionally dust with powdered sugar before serving.