Pour the butter, 2 tablespoons of orange juice, and brown sugar into a bowl. Beat until smooth - until smooth I did not really work, whipped for 5 minutes.
Add the eggs one at a time, beating them into a fluffy foam.
Add pumpkin puree, cinnamon, pepper, flour and baking powder.
Mix well - I whipped with a blender.
Form to grease with oil, sprinkle with flour-shake off the excess.
I have silicone, so nothing smeared.
Made for half a serving-a form with a capacity of 1.25 liters.
The oven is preheated to 180 degrees.
Bake for 45-50 minutes - I made half a portion and baked for 25 minutes.
Cool the cake on the grill.
RUB the powdered sugar with two tablespoons of orange juice.
Place on a cupcake and sprinkle with pistachios.
Tastes better the next day.