In a large bowl, combine cream, sweetened condensed milk, coffee, and vanilla. Refrigerate until cool.
In the meantime, crush the candy into bite sized bits.
Once cooled, beat the cream mixture using a hand-held mixer or a stand mixer on medium until thickened and custard-like, about 10 minutes. Fold in crushed toffee bits. Spoon mixture into a 2-quart dish. Cover and freeze several hours or overnight.
Makes 6 cups, or 12 ½ cup servings
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