1-First Steps: Prep and Mixing: Separate 4 egg whites into a bowl and age them in the refrigerator covered with plastic wrap for a few days to dehydrate. This step helps create that signature macaron texture. Next, sift 1 cup almond flour, 2 cups powdered sugar, 1/2 teaspoon cinnamon, 1/4 teaspoon ginger, 1/4 teaspoon nutmeg, 1/2 teaspoon instant espresso, and 1/4 teaspoon allspice together multiple times for a fine mixture.

2-First Steps: Prep and Mixing: Beat the egg whites with cream of tartar and salt until frothy, then gradually add 1/4 cup granulated sugar until stiff peaks form. This gives a thick, marshmallowy texture that’s essential for the shells.

3-Forming and Baking the Shells: Fold the dry mixture into the meringue in thirds using the macaronage technique until the batter reaches a lava-like consistency. It should fall slowly off the spatula and pass the figure 8 test. Transfer the batter to a piping bag fitted with a medium round tip, and pipe one-inch rounds onto parchment paper-lined baking sheets.

4-Forming and Baking the Shells: Tap the sheets several times to release air bubbles, then let the macarons rest uncovered for 40 to 60 minutes until they are dry to the touch. Bake at 300°F for 20 minutes, then cool on the pan for 10 minutes before moving to a wire rack.

5-Assembling the Macarons: For the buttercream, cream 1/2 cup softened butter with 1/4 cup pureed pumpkin, then add 2 cups powdered sugar, 1/2 teaspoon cinnamon, 1/2 teaspoon instant espresso, a pinch of nutmeg, a pinch of allspice, and a pinch of ginger. Mix well, add 1 teaspoon vanilla, scrape the bowl, and mix again. Pipe the buttercream onto the bottom of one macaron shell and sandwich with another. Refrigerate in a sealed container for one to two days before serving.