In game Escape menu displays all the time

Ive recently coded a pause menu that should display when the escape key is pressed. It is composed of several buttons that edit traits/save the game, but when i run the game these buttons show all the time regardless of weather or not escape has been pressed, if someone could give me some insight into whats going wrong i would greatly appreciate it :P (Code:)

 using System.Collections;
 
 public class EscMenu : MonoBehaviour {
 
     private bool EscaMenu;
 
     // Use this for initialization
     void Start () {
     
     }
     
     // Update is called once per frame
     void Update () {
     
         if (Input.GetKeyDown(KeyCode.Escape)) 
             {
                 EscaMenu = true;
             }
         }
     void OnGUI()
         {
         if (EscaMenu = true)
         {
             if(GUI.Button (new Rect(10, 100, 100, 30), "Health Up"))
             {
                 GameControl.control.health += 10;
             }
             if(GUI.Button (new Rect(10, 140, 100, 30), "Health Down"))
             {
                 GameControl.control.health -= 10;
             }
             if(GUI.Button (new Rect(10, 180, 100, 30), "Exp Up"))
             {
                 GameControl.control.experience += 10;
             }
             if(GUI.Button (new Rect(10, 220, 100, 30), "Exp Down"))
             {
                 GameControl.control.experience -= 10;
             }
             if(GUI.Button (new Rect(10, 260, 100, 30), "Save"))
             {
                 GameControl.control.Save();
             }
             if(GUI.Button (new Rect(10, 300, 100, 30), "Resume"))
             {
                 EscaMenu = false;
             }
             if(GUI.Button (new Rect(10, 340, 100, 30), "Quit"))
             {
                 Application.LoadLevel(0);
             }
         }
 
     }
     
 }

Thanks for looking at this! -Drake