Destroying An Instance of an object and childs

Hey guys, I have been trying to work out how to Destroy MiniMenuBase after Instantiating it with right click and then being able to create it again if I right click again for a few hours now and can't seem to get it to work. I think it is a issue with how I am Instantiating it but I do not have the experience to see what the issue is. Thank you

 public GameObject MiniMenuBasePrefab;
 public GameObject MoveButtonPrefab;
 public GameObject AttackButtonPrefab;
 public GameObject DefendButtonPrefab;

 private bool IsMiniMenuOpen;

 void Awake()
 {
     Instance = this;
 }

 // Use this for initialization
 void Start()
 {

 }

 // Update is called once per frame
 void Update()
 {
     CheckMouseInput();
 }

 //
 private void CheckMouseInput()
 {
     GameObject MiniMenuBase = null;
     if (Input.GetMouseButtonDown(1) && OverWatchVault.VltSelectedUnitIsHoveredOver == true && OverWatchVault.VltSelectedUnit != null && IsMiniMenuOpen != true)
     {
         IsMiniMenuOpen = true;
         CreateMiniMenu(MiniMenuBase);
     }
     if(Input.GetMouseButtonDown(0) && IsMiniMenuOpen == true && MiniMenuBase != null)
     {
         DestroyMiniMenu(MiniMenuBase);
     }

 }

 //
 private void CreateMiniMenu(GameObject _MiniMenuBase)
 {
     _MiniMenuBase = Instantiate(MiniMenuBasePrefab);
     _MiniMenuBase.transform.position = OverWatchVault.VltSelectedUnit.transform.position;
     _MiniMenuBase.transform.rotation = OverWatchVault.VltSelectedUnit.transform.rotation;

     Canvas MiniMenuBaseCanvas = _MiniMenuBase.GetComponentInChildren<Canvas>();
     CheckAllUnitInteractions(MiniMenuBaseCanvas);
 }

 //
 private void DestroyMiniMenu(GameObject _MiniMenuBase)
 {
     DestroyObject(_MiniMenuBase);
 }