Cook pasta to aldente, can be done ahead of time. run under cold water to ensure pasta does not over cook

In sausepan melt but into broth over medium heat.

Add flour to mason jar then fill 2/3 with milk, shake vigorously until encorporated...about 2 min.

Slowly add flour mixture to butter and broth stirring constantly.

Add rest of milk ensuring everything is complete encorporate.

Turn heat down to simmer then slowly shred block cheese into sausepan stirring constantly.

After cheese has been encorporated turn heat to medium and stir occasionally for 5 min.

Remove from heat and wait 5 min before serving.