Directions:

• Step 1: Prepare Your Baking Sheets

  Line two baking sheets with parchment paper or a silicone mat. If using parchment, you can trace heart shapes to help guide your piping.
• Step 2: Sift Dry Ingredients

  In a medium bowl, sift together the almond flour and confectioners' sugar. This step is crucial to avoid lumps and achieve a smooth macaron shell.
• Step 3: Whip the Egg Whites

  In a clean mixing bowl, use a stand mixer or hand mixer to whip the egg whites on medium speed until they become foamy. Gradually add the granulated sugar while continuing to whip. Increase the speed to high and whip until stiff peaks form and the meringue is glossy.
• Step 4: Add Food Coloring

  Carefully add the gel food coloring to the meringue and mix gently until the color is evenly distributed.
• Step 5: Fold in Dry Ingredients

  Using a silicone spatula, fold the almond flour mixture into the meringue in three additions. Be gentle but thorough; the batter should flow like lava when it’s ready.
• Step 6: Pipe the Macarons

  Transfer the macaron batter to a piping bag fitted with a round tip. Pipe heart shapes onto the prepared baking sheets, leaving space between each one. Tap the baking sheets on the counter to release any air bubbles.
• Step 7: Rest the Macarons

  Let the piped macarons sit at room temperature for 30-60 minutes, or until a skin forms on the surface. They should not be sticky to the touch.
• Step 8: Bake

  Preheat your oven to 300°F (150°C). Bake the macarons for about 15-18 minutes or until they have risen and the tops are firm. Let them cool completely on the baking sheets.
• Step 9: Prepare the Lemon Buttercream

  In a mixing bowl, beat the room temperature butter until creamy. Gradually add the confectioners' sugar, salt, and lemon juice. Beat until light and fluffy.
• Step 10: Assemble the Macarons

  Pair up the macaron shells of similar sizes. Pipe a dollop of lemon buttercream onto the bottom of one shell and gently sandwich it with the other shell.
• Step 11: Decorate

  If desired, sprinkle some sprinkles on top of the macarons for an extra touch of whimsy.