Next, combine all of the ingredients in the saucepan and heat while whisking regularly with theblending whisk.
Bring the toffee mixture to a boil.
Then, reduce the heat to low and let the mixture simmer for 15-20 minutes while whisking.
Continue to whisk the mixture while cooking to reach the correct thickness- it will need to be pretty thick.
Finally, pour the toffee glaze into a jar or a measuring glass with a pouring lip and use a spatula to help scrape it all out of the pan. Let the glaze (and the cake) cool completely before pouring the glaze on top of the bundt cake.