https://scm.ncsu.edu/scm-articles/article/the-price-of-a-big-mac-in-denmark-worth-the-wages
Of course, the price for McDonalds food WILL increase if you raise the minimum wage. Who eats at McDonalds, primarily? It's the poor, or middle class in some cases. Rich people don't eat there. This cost will be borne by the poor and middle class.
As the article points out, Danes are unique in their desire (and wealth) to pay more for food. It is not that way in other Euro-countries. It will not be that way in the USA either.
The fact she doesn't understand how this will not achieve the stated goal and will be a cost borne by the very people she is trying to "help", shows how stupid she really is.