Ingredients
Equipment
Method
- Cream the softened butter, granulated sugar, and powdered sugar in a bowl until fluffy to build the base so it is light.
- Mix in the egg yolks and vanilla bean paste until completely smooth to enrich the dough so it tastes like custard.
- Fold the flour, baking powder, and salt into the wet mixture until just combined to form the dough so it stays tender.
- Chill the dough in the refrigerator for thirty minutes to firm the butter so the cookies do not spread too thin.
- Scoop the dough into balls, flatten them slightly on a baking sheet, and bake at 350 degrees for twelve minutes to set the edges.
- Let the baked cookies cool completely on a wire rack to firm up the center so they can support the hot sugar.
- Spoon an even layer of granulated sugar over the top of each cooled cookie to prepare for caramelization.
- Use a kitchen torch to melt the sugar continuously until it bubbles and turns a deep amber color to create the glass shell.
Notes
For the best shattering crunch, apply the sugar in two thin, even layers, torching the first layer slightly before adding the second.
