Special equipment: a candy thermometer
Spread out the almonds in an even layer on a foil-lined baking sheet. Set aside.
In a saucepan over medium-high heat, melt together the butter, maple syrup, brown sugar, allspice and salt. Bring to a boil and cook, still boiling, for 1 minute, or until the mixture reaches 190 degrees F on a candy thermometer. Pour over the almonds and let cool completely while the sugar mixture sets. Serve immediately.