1.4ouncechocolate covered toffee bars(about 1/4 cup crushed)
In a large bowl, combine cream, sweetened condensed milk, espresso powder, 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-high until thickened and custard-like, about 5-10 minutes.
Fold in crushed toffee bits. Spoon or pour mixture into an ice cream container or 2-quart dish. Tap the bottom of the dish on the counter a couple of times to help get any air bubbles out of the mixture. Cover and freeze several hours or overnight.