Is my Golden overweight?

My girl is a big boned beauty, and 85lbs. I think her weight is cohesive with her build. I love her floof and her block head, but she’s just a lazy girl! I walk her every day for about 45 minutes, and it wipes her out. She gets about a cup and a quarter of food morning/night. I think she could lose 5 lbs but would look unhealthy with losing any more. Anyone else have a bigger built female?