Get ready for a glowup to coffee's best friend because this cardamom plum coffee cake recipe is something special! Super moist buttermilk cake with juicy plums, topped by a spicy cardamom oat crumble and accompanied with rich, spiced and roasted plums. This summer bake is a breakfast must have!
Combine all ingredients in the bowl of your stand mixer and paddle until pea sized, crumbly granules. You do not want the butter to homogenize with the other ingredients and form a dough. Place in the fridge until ready to use.
To prepare the coffee cake:
Slice the plums in the half and remove the pits. Slice each half into 6 slices and toss in the lemon juice, cardamom, and brown sugar. Set aside.
Preheat the oven to 350°F, and prepare a 9” pan with pan spray lined with parchment paper.
With your stand mixer and paddle or hand mixer and beaters, cream together the butter with the granulated sugar until pale and fluffy on medium-high speed. Scrape the bowl and mix for an additional 30 seconds.
Bringing the speed down to medium low, add the eggs in one at a time scraping the bowl in between each addition. Scrape the bowl and mix for an additional 30 seconds.
Combine the remaining dry ingredients together and add it to the batter in three additions alternately with the buttermilk in two additions. Scrape the bowl and mix until incorporated.
Pour the batter into the prepared cake pan, and line the plum slices on top. It’s okay if they overlap. Sprinkle the crumble on top, and bake for 75-90 minutes or until a knife inserted comes out clean.
To prepare the roasted plums:
Preheat the oven to 400°F. Slice the plums in the half and remove the pits. Slice each half into 4 slices and lay them in a pan with the remaining ingredients.
Bake for 10-20 minutes depending on how soft or firm you’d like them. Serve warm with the cake, and don’t forget to drizzle some of the juices on top.