For Macarons
- Line 2 baking sheets with parchment paper.
- Pulse almonds with 50 g confectioners sugar in a food processor until very finely ground, 2 to 3 minutes, then transfer to a bowl.
- Sift in remaining cup confectioners sugar, stirring to combine.
- Beat egg whites with salt in another bowl with an electric mixer at medium speed until they just hold soft peaks.
- Add granulated sugar, a little at a time, beating, then increase speed to high and continue to beat until whites just hold stiff, glossy peaks.
- Add drops of food coloring to reach desired shade and mix at low speed until evenly combined.
- Stir almond mixture into meringue with a rubber spatula until completely incorporated.
- (Meringue will deflate).
- Spoon batter into bag, pressing out excess air, and snip off 1 corner of plastic bag to create a 0,5 cm opening.
- Twist bag firmly just above batter, then pipe peaked mounds of batter (the size of a chocolate kiss) onto lined sheets about 4 cm apart.
- Let cookies stand, uncovered, at room temperature until tops are no longer sticky and a light crust forms, 20 to 30 minutes.
- Meanwhile, put oven racks in upper and lower thirds of oven and preheat oven to 150°C - 300°F.
- Bake cookies, switching position of sheets halfway through baking, until crisp and edges are just slightly darker, 20 to 25 minutes.
- Cool completely on sheets on racks, about 30 minutes.