Preheat the Oven: Start by heating your oven to 325°F. Line a large baking sheet with parchment paper so the pecans do not stick and clean up stays easy.
Whip the Egg Whites: Add the egg whites to a mixing bowl and whisk until slightly foamy. You do not need stiff peaks, just enough air to help the sugar coat the nuts evenly.
Add Sugar and Spice: Pour in the brown sugar, granulated sugar, cinnamon, and melted butter. Stir well until the mixture looks smooth and glossy.
Coat the Pecans: Add the pecan halves to the bowl and toss until every piece looks fully coated. Take your time here so the flavor spreads evenly.
Spread on the Pan: Pour the coated pecans onto the prepared baking sheet. Spread them into a single layer so they bake evenly.
Bake and Stir: Place the pan in the oven and bake for about 40 minutes. Stir the pecans halfway through to keep them from clumping and help them brown evenly.
Cool Completely: Remove the pan from the oven and let the pecans cool fully. As they cool, the sugar hardens and creates that crisp texture.
