Preheat oven to 200°F. Line baking sheets with parchment paper. Using a 3-inch round mold, mark the interior ring with a pencil. Continue to make 12 per baking sheet. Flip the parchment paper over so pencil markings are underneath.
Place egg whites in the bowl of a stand mixer fitted with the whisk attachment or use hand mixer and place in a large bowl. Beat until light and foamy on low speed. Turn off the mixer and add the orange extract. Carefully, add the powdered sugar and beat on medium speed for 20 minutes. The meringue will get thick.
Spoon some of the meringue into a decorating bag fitted with a star tip. Then alternately add some colored food gel and then meringue on top of that. Repeat until ⅚ of bag is full.
Pipe the meringues starting in center of one circle and swirl outward in a circular motion until lined template mark. Repeat until all meringue is used. This made 20.
Bake for 2 hours. Turn oven off and allow meringues to sit in oven until completely cooled. Remove from oven when cool.
Spread 1 tablespoon of Nutella on the flat bottom of one meringue cookie and twist and with the flat bottom of another press to make a sandwich. Refrigerate until ready to serve in an airtight container.
Replacing the specified orange extract with standard vanilla extract fundamentally alters the aromatic profile by removing the essential citrus oils that cut through the high sugar content. Standardizing the egg white whipping process requires starting at a low speed to build a stable protein matrix before incorporating dry ingredients. Granulated sugar can sometimes be substituted for powdered sugar, but cornstarch in powdered sugar acts as an anti-caking agent and stabilizer necessary for structural integrity during a two-hour bake at 200 degrees Fahrenheit.
The Chemistry of Meringue and Chocolate
Egg whites consist of proteins coiled in liquid, which unfold and trap air when agitated. Long whipping times—specifically twenty minutes on medium speed—allow these proteins to cross-link densely around air bubbles. Introducing high-sugar loads late ensures the mixture maintains viscosity without deflating the foam. Fat molecules from the Nutella filling will deflate poorly whipped albumen on contact, which is why complete cooling inside the deactivated oven is mandatory to drive out residual moisture.
Dietary Adjustments and Storage
Natural variations in this formula accommodate gluten-free and vegetarian diets automatically without requiring structural alterations. Airtight refrigeration extends the shelf life of assembled sandwiches, preventing humidity from dissolving the brittle crust.