Cinnamon shortbread cookies that crumble delicately are a Mexican holiday favorite. This family-friendly treat is a buttery, aromatic, melt-in-your-mouth confection.
Preheat oven to 350°F (175°C) and line two baking sheets with parchment paper to ensure even baking and easy cleanup.
In a large bowl, beat the unsalted butter until light and creamy, then gradually mix in the powdered sugar for a smooth, fluffy base.
Add the flour, ground almonds, 1.5 tsp ground cinnamon, and salt. Mix on low speed just until the dough comes together; avoid overworking it to keep the cookies tender.
Scoop out tablespoon-sized portions, gently roll them into balls, and place 2-inches apart on the prepared baking sheets. Slightly flatten each ball for uniform thickness.
Bake for 14–16 minutes or until the edges just begin to turn golden; do not overbake to maintain a melt-in-your-mouth texture.
Let cookies cool for 5 minutes on the sheet, then carefully toss each warm cookie in a mixture of granulated sugar and 0.5 tsp ground cinnamon for a fragrant coating.