1-Creating white chocolate macaron filling starts with simple steps that anyone can follow, even if you’re new to baking. First, prepare the white chocolate ganache filling ahead, as it needs at least 2 hours to set; you can make it up to a week in advance, ideally the night before to save time. Place the chopped white chocolate in a medium bowl and heat the heavy cream in 15-second intervals in the microwave until it just begins to bubble, or warm it over medium-high heat in a saucepan until it’s steaming.

2-Pour the hot cream over the white chocolate, making sure it’s fully submerged, and let it sit for a couple of minutes to melt properly. Stir the mixture with an immersion blender or a spoon until it’s smooth and fully combined, which helps achieve that silky texture essential for white chocolate macaron filling. Cover the ganache with plastic wrap pressed against the surface and refrigerate it for at least 2 hours or overnight to thicken.

3-When you’re ready, fill a piping bag fitted with a large round tip with the ganache, ensuring it’s thick enough to hold its shape. Pipe a thick dollop onto one macaron shell and gently press a second shell on top to form a sandwich. Store the filled macarons in an airtight container in the refrigerator overnight before serving to let the flavors develop, and remember to refrigerate any leftovers for freshness.