Preheat the oven to 200°C/400°F/Gas mark 6. Line a baking sheet with baking paper or a silicone mat.
Make the choux pastry. Chop the butter and add it to a small saucepan with the water and salt. Heat until the butter has melted and the mixture is starting to bubble. Meanwhile, combine both flours in a separate bowl. When the butter mixture is bubbling, remove it from the heat and add the flours all in one go. Stir with a wooden spoon until it forms a smooth ball that pulls away from the sides very easily – this is called a panada.
Transfer the panada to a stand mixer (or use a handheld electric whisk) fitted with the paddle attachment and leave to cool for five to 10 minutes.
Add two eggs, one at a time, to the panada, mixing on slow speed after each addition until combined. Whisk the third egg in a separate bowl and gradually add one tablespoon at a time, mixing well after each addition. You are looking for a glossy consistency that leaves a ‘v’ shape when a spoon is lifted out of the dough. Transfer to a piping bag and cut a medium tip. Pipe about 15 circles onto the prepared baking sheet or mat. Dip your finger in water and use to flatten the tip of the choux.
Bake for 10 minutes, then reduce the oven to 180°C/350°F/Gas mark 4 and bake for a further 20 minutes. Don’t open the oven until at least 25 minutes have passed, to avoid the choux pastry deflating.
When the choux buns have finished baking, immediately turn them over and use a knife to pierce the base. This is so that the air inside has somewhere to escape.
While the choux are cooling, make the strawberry filling. Put the cream, sugar and strawberry powder in a clean, grease-free bowl. Whip on medium-high speed until stiff enough to pipe and hold its shape, but be careful not to overwhip. While whipping, gradually add very small amounts of pink food dye until a pale pink is achieved. Transfer to a piping bag and cut a large tip. Cut the tops off each choux bun, pipe in the whipped cream and replace the top.
Knead a tiny amount of pink food dye into the marzipan. Shape it into noses for the pig faces and place on the whipped cream.
Make the royal icing and dye black. Use a stand mixer (or handheld electric whisk) fitted with a balloon whisk attachment to combine the egg white (or aquafaba) and icing sugar until you get a smooth consistency. Then add tiny amounts of extra egg white (or aquafaba) and/or icing sugar to get the right consistency. Add black food dye to colour as desired! Transfer to a piping bag and cut a small tip. Use to pipe each pig’s eyes and two dots for nostrils.
Melt some dark chocolate in a heatproof bowl set over a pan of gently simmering water. Make sure the bottom of the bowl doesn’t touch the water. Arrange the pigfiteroles in a mud bath of melted chocolate and carefully drizzle some chocolate over the tops to finish off your pigfiterole scene! It’s best to eat these delicious cuties straightaway… not that that will be difficult at all!