Ingredients:
- For the cookies:
- 140 grams ground almonds (used blanched almonds)
- 140 grams powdered sugar
- 100 grams egg whites (about 3 eggs)
- 100 grams sugar
- 40 grams water
- Zest of 1/2 lemon
- Food colouring
- For the filling:
- 1 cup blueberries
- 1/4 cup sugar
- Zest of 1/2 lemon
- Juice of 1 lemon
- 3 cups powdered sugar
- 1/3 cup butter, softened
Instructions:
- Prepare two cookie sheets with parchment paper.
- Combine the almonds and powdered sugar in a food processor until finely ground.
- Sift the mixture into a large bowl to remove any lumps.
- Add 50 grams of the egg whites and mix into the almond/sugar mixture to form a paste.
- Add a few drops of food colouring to the paste, mixing until uniform. Set aside.
- In another bowl, beat the remaining egg whites until soft peaks form.
- Meanwhile, combine the sugar, water and lemon zest in a small saucepan.
- Bring to a boil over low heat and continue to heat until it reaches 115 degrees C (check with a candy thermometer).
- Once the sugar mixture reaches 115 degrees C. remove from the heat and slowly add to the beaten egg whites.
- Mix on high for about 3 minutes or until the bowl is cool and stiff peaks form. You want to be able to turn the bowl upside down without the meringue falling out.
- Fold the meringue into the almond paste mixture, using your spatula to press onto the sides of the bowl to smooth it out and remove any lumps.
- Mix until you have a smooth batter that runs off of the spatula slowly in a thick ribbon.
- Add the batter to a piping bag or ziploc with the corner cut off and fit with a size 12 round cake tip.
- Pipe small, 1 1/2 inch circles onto the parchment paper-lined cookies sheets. You should get about 60 cookies.
- Pipe the circles by holding the piping bag upright with the tip just above the sheet and pipe without pulling your hand up or moving it in circles.
- Tap the baking sheets a few times on the counter to remove any air bubbles and let the cookies sit out for about 30 minutes to dry.
- When ready, preheat oven to 300 degrees F.
- Bake cookies for 18 minutes. Remove from the oven and let them cool completely on cooling racks before removing them from the parchment paper (they will stick when warm).
- While the cookies are cooling, make the buttercream filling.
- Combine the blueberries, 1/4 cup of sugar, lemon zest and lemon juice in a small saucepan.
- Bring mixture to a boil over low heat. Cook until the sugar is dissolve and blueberries are soft.
- Remove from heat and strain the blueberries, reserving the liquid.
- Combine the cooked blueberries, powdered sugar and butter in a medium bowl, beating until smooth.
- Add more powdered sugar or the reserved liquid from the cooked blueberries as needed to reach a stiff, buttercream consistency. I added about 1 Tablespoon of the liquid.
- Pipe a small amount of icing onto the cooled macarons and form sandwiches.