How to return a dynamically allocated two-dimensional array?

In a generic formulation, I have a function that places a value in an array of strings; just as an example:

char **matrizExemplo()
{
    char **vet;
    char tamVetor = 1;

    vet = malloc(sizeof(char*)*tamVetor);
    vet[0] = malloc(sizeof(char*)*10);

    strcpy(vet[0], "teste");
    printf("Dentro da funcao vet[0] e %s\n", vet[0]);

    return vet;
}

int main()
{
    char **retorno;

    retorno = matrizExemplo();
    printf("Retorno e: %s\n", retorno[0]);

    return 0;
}

I can print the vet [0] inside the function, but when I execute segmentation fault, where am I wrong?