Melt the butter gently in a sauce pan. If desired, you can brown the butter, but this is not necessary. Once melted, set aside and leave to cool.
Sift together the sugar, self-raising flour, and finely ground pistachios.
Using your stand mixer, whisk egg whites until soft peaks form.
Fold in the flour mixture with a spatula. Once incorporated, add the melted butter , honey, and almond extract and mix thoroughly.
Place batter in the fridge to cool for at least one hour.
While batter is chilling, butter and dust your madeleine tin and place in the fridge to cool as well.
Heat your oven to 350 deg F when ready to bake.
Take your madeleine tin and batter out of the fridge and put roughly 3/4 tbps of batter into each section of the tin.
Bake for 12 minutes or until the madeleines are springy to the touch.
Let madeleines cool in the tin for a minute then turn the madeleines out and serve immediately.