@joshpsmalley: Getting into my horde of plums 4! This weekend it's an Upside Down Buttermilk Plum Cake. A bit of bucket chemistry for this one (😆) but roughly: Plums (sliced into wedges and placed into lightly buttered tin) 250g brown sugar 150ml sunflower oil 4 eggs 1 pot buttermilk (ca 290g) 1 tsp vanilla bean paste 300g plain flour 1-2 tsp bicarbonate of soda Bake at 180C/160C fan/gas 4 for 50 minutes And your Sunday science: the acidity in the buttermilk means you needly only bicarbonate of soda instead of baking powder, creating the CO2 bubbles that help the cake rise. #baking #plums #weekend #relax

Dr Josh Smalley

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Sunday 23 August 2026 12:31:14 GMT