Preheat the oven to 175 °C top-bottom heat. Line a muffin tray with paper cups.
For the batter, mix all dry ingredients together. In a mixing bowl, whisk together all the “wet” ingredients. Add the dry mixture and mix briskly with a hand mixer until smooth.
Pour halfway into each of the prepared ramekins and bake for 20-25 minutes. Immediately brush the hot cakes with apricot jam and sprinkle with hail sugar in the center. Then let cool completely on a baking rack.
For the topping, peel and pit the apricots. Puree the pulp very finely with vanilla sugar and pass through a sieve. Mix the mascarpone with yogurt, powdered sugar and the resulting apricot puree until creamy.
Fill the mixture into a piping bag and spread it in small squirts on the poppy seed cakes.