Whisk the egg whites in clean dry bowl (no trace of water please) till soft peaks are formed. Add the caster sugar, and beat on a low speed. Once combined increase the speed to high and whisk till glossy and stiff peaks are formed (For me, it took 7 minutes on electric hand beater on a high speed). Add the food color of your choice and beat for 25-30 seconds. Please make sure not to over beat the egg whites.
Sift the flour mixture over the whites and fold gently using a flexible spatula. You need a smooth and shinny mix. Do not make the batter too runny or the macaroons won’t rise as they should. When you lift the batter up and let it drop down, it should slowly disappear into itself without leaving a peak.
Transfer the batter to a pastry bag fitted with a 1/2-inch plain round tip. On a parchment-lined baking sheet pipe the ¾ inch rounds leaving 1-2 inch gap between each piping. Drag the pastry tip to the side of rounds rather than forming peaks. Tap bottom of each sheet on work surface to release trapped air.
Allow the piped macarons to stand on a room temperature for 30-45 minutes. The stand time varies with temperature at different places. What you need is the piped macarons to form a very thin, smooth crust, when you tap it lightly with your finger, the batter will not stick to your finger.
Reduce oven temperature to 140 C. Bake 1 sheet at a time, rotating halfway through, until macarons are crisp and firm, about 10 minutes. After each batch, increase oven temperature to 160 C , heat for 5 minutes, then reduce to 140 C.
Let macarons cool on sheets for 2 to 3 minutes, and then transfer to a wire rack. If macarons stick, spray water underneath parchment on hot sheet. The steam will help release macarons.
When fully cooled, Sandwich 2 same-size macarons with the filling of your choice.
Butter cream –
- Unsalted butter – 125 grams, at room temperature
- Icing sugar – 1 1/2 cups
- Milk – 2 tablespoon
In a clean blow beat the the butter till as white as possible. Gradually add in the icing sugar and milk till stiff peaks.