Irish cream liqueur contains Irish whiskey, sugar and cream. Depending on the brand, the liqueur may have spicy toffee or honey chocolate flavors.
Brownies are done when edges look dry and start to pull away from the sides of the pan. Bake the brownies for the minimum time recommended, and then check their edges. Remove the brownies from the oven as soon as the edges are done; overbaked brownies are dry and hard.