Ingredients
Equipment
Method
Make the shells
- Heat the oven to 300°F and line two 18x13-inch baking sheets with parchment paper.
- Sift the almond flour, powdered sugar, and cocoa powder into a bowl, discarding any large pieces that remain in the sieve.
- In a clean bowl, beat the egg whites and cream of tartar with an electric mixer on medium speed until foamy.
- Gradually add the granulated sugar and beat on medium-high until the meringue is glossy and forms stiff peaks, about 5 to 7 minutes.
- Fold the sifted dry ingredients into the meringue in three additions, stopping when the batter falls from the spatula in a thick ribbon that settles back into the bowl within about 10 to 15 seconds.
- Transfer the batter to a piping bag fitted with a 1/2-inch round tip and pipe 1 1/2-inch rounds onto the prepared sheets, leaving about 1 inch between them.
- Tap each sheet firmly on the counter a few times to release air bubbles.
- Pop any visible bubbles with a toothpick.
- Let the shells stand until their tops feel dry to a light touch, 30 to 60 minutes.
- Bake one sheet at a time for 14 to 17 minutes, until the shells have risen feet and their tops do not shift when lightly touched.
- Cool completely on the sheet before carefully peeling off the parchment.
Make the filling and assemble
- Put the chopped chocolate in a heatproof bowl.
- Heat the heavy cream in a small saucepan until steaming, then pour it over the chocolate and let stand for 2 minutes.
- Stir the chocolate and cream until smooth.
- Let the ganache cool until thick and pipeable, about 30 to 45 minutes.
- Pipe or spread ganache onto the flat side of half the shells.
- Sandwich with the remaining shells.
- Refrigerate in an airtight container for at least 12 hours.
- Bring to room temperature for about 20 minutes before serving.
Notes
For well-formed feet, let the piped shells dry until their tops feel dry to a light touch before baking. Store in an airtight container in the refrigerator for up to 5 days; freezing is suitable. For a dairy-free variation, use dairy-free semisweet chocolate and coconut cream, keeping in mind the ganache texture may differ.
