Measure all ingredients and chop the nuts.

In a medium saucepan, combine evaporated milk, butter, and granulated sugar. Stir to combine.

Heat over medium, stirring constantly until the mixture reaches a rolling boil.

Once boiling, cook for 4–5 minutes while stirring until it thickens slightly and looks syrupy.

Remove from heat and quickly add the chocolate morsels and marshmallows; stir until melted and glossy.

Stir in the chopped nuts until evenly distributed.

Pour into a greased pan, smoothing out the top evenly.

Let cool at room temperature or chill briefly in the fridge until fully set.

Cut into squares and serve.