Ingredients for choux pastry:
100 g of butter
125 ml of water
125 ml of milk
0.5 teaspoons of salt
150 g of flour
4 eggs
Ingredients for the cream:
500 ml of 33-36% cream
160 g of icing sugar
150 g of sour cream
Ingredients for decoration:
100 g of chocolate
A little vegetable oil
Method:
Preparation of the choux pastry:

In a saucepan, combine 100g of butter, 125ml of water, 125ml of milk and 0.5 teaspoon of salt and bring to the boil.
Add 150 g of flour and mix vigorously until a homogeneous mixture is obtained.
Put the mixture back on the heat for a few minutes to dry it, stirring constantly.
Allow the dough to cool slightly.
Gradually add the eggs, one at a time, until you reach the desired consistency.
Cooking the cream puffs:

Transfer the dough into a piping bag and form small mounds on a baking tray lined with baking paper.
Bake in a preheated oven at 180°C for 25-30 minutes or until golden brown.
Prepare two trays full of cream puffs and let them cool.
Preparation of the cream:

In a bowl, whip 500ml of cream with 160g of icing sugar until you obtain a fluffy consistency.
Add 150 g of sour cream and mix gently.
Assembling the profiteroles:

Cut the cooled cream puffs in half and fill them with the prepared cream.
Arrange half of the filled profiteroles in a 20cm ring and cover them with half of the remaining cream.
Repeat with the other half of the cream puffs and cream.
Cover and refrigerate for at least 4 hours to allow the cake to stabilize.
Decoration:

Melt 100 g of chocolate and add a little vegetable oil to make it more fluid.
Decorate the cake with melted chocolate.
Note:
The consistency of the choux pastry is crucial; it should be firm enough to hold its shape, but soft enough to expand during cooking.
For the cream, sour cream can be mixed with whipped cream to give a slightly tart flavor that balances the sweetness.
Decorating with melted chocolate adds an elegant touch and a complementary flavor to the profiteroles.
Make sure you let the puffs cool completely before filling them, otherwise the cream may melt.
Once finished, the cake will be ready to be served and enjoyed!