Red Currant Bakery

Plum Butter
0 Rinse, pit, and dice the plums into 1″ chunks.
2 In a large heavy bottomed pot, add in the plums and water. Cover with a lid and place over medium low heat.
3 Cook for about 10 minutes until the juices are bubbling up past the chunks of plum.
4 Remove the lid and continue cooking and stirring until all of the plums and their skins have broken down.
5 Keep cooking and stirring until thick and the mixture no longer looks thin and watery. This usually takes about 15-20 minutes.
6 Once thick, remove from the heat and set aside to cool.
7 Transfer to a large shallow dish to let it cool completely while you move onto the next step. It doesn’t need to be fridge cold but it can be!
Streusel
9 In a medium bowl add in the soft butter, both sugars, cinnamon salt and vanilla. Use a fork to stir together until smooth.
10 Pour in the flour and use the fork to rub the flour into the butter mixture until fully combined.
Cake Batter
12 Preheat the oven to 350 F and place a rack in the center.
13 In a medium bowl add in the sugar, flour, baking soda, baking powder, and salt and whisk to combine.
14 Add in the butter, sour cream, eggs, and vanilla.
15 Use the paddle attachment or an electric hand mixer to mix the ingredients first on medium low until 90% combined.
16 If not using a non-stick pan, spray the metal pan with your baking spray and line with a rectangle of parchment that is 15" x 8" from one side to another. Pour in the cake batter.
17 Smooth out the cake with a rubber spatula or a mini offset spatula.
Assemble and Bake 
19 Carefully spoon the cooled plum butter on top of the cake layer. Use a mini offset spatula or the back of a spoon to spread the plum butter into an even layer. Do your best not to mix it with the cake batter.
21 Place the cake in the fridge or freezer while prepping the plums.
20 Cut the plums in half and remove the pits. Then cut each half into four slices. Lay the slices down on their sides in rows across the top of the cake to cover the surface.
22 Clump the streusel and sprinkle it over the fruit layer.
23 Place the cake into the preheated oven and bake for 30 minutes. Rotate the cake 180 degrees and bake for 30 more minutes.
24 The cake will be done when the streusel will be slightly more golden brown in some spots and the cake should only have a very slight or no wobble.
25 Once baked, remove from the oven and leave to cool for at least 15-20 minutes on a wire rack. Run a knife along the edge between the cake and the pan. Then either lift the cake out with the parchment or slice the cake while it's still in the pan.