Between living in regal palaces and owning all the dolphins in the UK, Queen Elizabeth II is not like the rest of us in most ways. But there is one thing that many of us do have in common with her: a weakness for chocolate cake. Back in 2017, former royal chef Darren McGrady shared that the queen is especially partial to a certain chocolate biscuit cake that he served each day for afternoon tea.

"The chocolate biscuit cake is the only cake that goes back again and again and again, every day until it's all gone," McGrady told RecipesPlus. "She'll take a small slice every day until eventually there is only one tiny piece, but you have to send that up; she wants to finish the whole of that cake."

If the queen relocated from Buckingham Palace to Windsor Castle before she made it to the last slice, McGrady brought the leftover cake with him by train. Wishing you could sample the royal dessert yourself? If you’re willing to spend a little time in the kitchen, you can: The full recipe is available on McGrady’s website.

For novice bakers picturing something decadent and complicated, don’t worry—the recipe is refreshingly simple, calling only for sugar, butter, dark chocolate, one egg, and rich tea biscuits or other sweet, hard cookies. Essentially, all you have to do is crumble the biscuits into small chunks, melt the dark chocolate, combine all the ingredients in a certain order, and let the cake chill in a pan in the refrigerator for a few hours. Then, you use additional melted dark chocolate as frosting.

Step-by-step instructions and ingredient amounts can be found here. And if you’re a little wary about using a raw egg in a no-bake cake, here’s a similar recipe that calls for whipping cream instead.

[h/t The Royal Chef]