Buttery, crunchy toffee coated in chocolate and almonds is a decadent family holiday confection. This classic candy delivers a satisfying snap and rich, caramelized flavor in every piece.
Line a baking sheet with parchment paper and set aside; ensure all ingredients are measured before beginning.
In a heavy-bottomed saucepan over medium heat, melt the butter fully, then add sugar and salt, stirring continuously.
Increase heat to medium-high, and cook mixture while stirring until it reaches 300°F on a candy thermometer—a deep golden color will develop.
Remove from heat and immediately stir in vanilla extract; pour the hot toffee evenly onto the prepared pan, spreading to desired thickness.
Let toffee sit for 3-5 minutes, then sprinkle chocolate chips over the surface; allow them to melt, then spread evenly. While chocolate is still warm, top with slivered almonds and gently press. Cool completely before breaking into pieces.