This is so delicious I make it almost every day! Super quick and easy!

Let cool to room temperature, stirring often to prevent a crust from forming.
Step 2: Make the dough
In another saucepan, melt 80g butter with a pinch of salt, a pinch of sugar, 100g milk and 100g water.
Add 120g flour and mix well.
Add the other 3-4 eggs one by one, mixing well after each addition.
Step 3: Cook
Spread the dough on 2 baking sheets covered with a silicone mat or baking paper, about 30 x 40 cm.
Bake in a preheated oven at 200°C for 10-15 minutes.
Let cool completely.
Step 4: Assemble the cake
Cut the chilled pastry into 8 pieces, then each piece into 4 pieces.
Beat 160g of room temperature butter for 5 minutes.