Salted or unsalted butter in maderia cake?

[starfish4]

After watching Great British Bake Off, DD wants to make a madeira cake. I've found a nice easy recipe which asks for butter - should I buy salted or unsalted butter?

Unsalted in a cake.

Never have unsalted in the house, just in case it winds up being used for sandwiches, toast or jacket potatoes. We always use salted, whatever the recipe says.

Unsalted

Technically, unsalted.
But, like 4merly, we never have unsalted in the house. All cake and biscuits are made with salted.

We've always used salted too

I find salted butter actually makes the cake taste sweeter - bit like the whole salted caramel thing