I have a simple class and it doesn’t answer when I call the methods

Question

Can someone help me?

class sorvete():
    def __init__(self,sabor, recipiente):
        self.sabor= sabor
        self.recipiente= recipiente
        self.ml= 0

    def sabor(self):
        print("O sabor que pediu é: ", (self.sabor))
        
    def recipiente(self):
        print("O recipiente que pediu é: ", (self.recipiente))
        

    def quantidade(self,ml):
        self.ml= self.ml + ml

sorvete1=sorvete('Morango','Casquinha')
print(sorvete1)
print(sorvete1.sabor())
print(sorvete1.recipiente())
print(sorvete1.quantidade(500))

Error:

Typeerror: 'str' Object is not callable