This being a royal recipe, nevertheless, there should be extra elements to make it further particular.
The primary is the addition of vanilla paste, providing a fragile floral observe which works splendidly with earl gray tea.
The second addition, and essential for the melt-in-the-mouth texture, is cornstarch.
Based on McGrady: “The cornstarch softens the shortbread, and makes it much less glutenous.
“As a substitute of snapping, it crumbles, and melts in your mouth.”
On this recipe, the royal chef makes use of a traditional Scottish shortbread mould with a thistle, the symbol of Scotland.