01 -
Sift almond flour and powdered sugar together, discarding any coarse particles.
02 -
Beat egg whites with cream of tartar in a clean bowl until frothy, then gradually add granulated sugar. Continue to whip until mixture forms stiff, glossy peaks (about 7 to 9 minutes).
03 -
Gently fold almond flour mixture into whipped egg whites, ensuring even consistency without deflating the batter.
04 -
Transfer batter to a piping bag and pipe 1.5-inch rounds onto a parchment-lined baking sheet, leaving space between each.
05 -
Allow piped shells to rest at room temperature for 30 minutes until a skin forms on the surface.
06 -
Preheat oven to 300°F (150°C). Bake shells for 18 to 20 minutes, rotating the tray halfway through. Shells are done when they lift easily from the parchment.
07 -
Remove baking sheet from oven and let shells cool completely before removing.
08 -
Beat softened butter with powdered sugar and heavy cream until smooth. Fold in crumbled Christmas Tree Cakes and mix until fully combined.
09 -
Pipe filling onto the flat side of a macaron shell, sandwich with a second shell, and press gently. Drizzle or dip with melted white chocolate if desired.
10 -
Let macarons mature in the refrigerator for at least 6 hours before serving for best texture.