Attach upper and lower waffle plates and preheat Grill & Broil to 400°F.
In medium bowl, cream butter with hand mixer. Mix in milk and eggs until combined.
Add flour, baking powder and salt. Mix to combine.
Fold in ham and cheese.
Pour ⅔ cup batter into center of each waffle plate and cook for 7-8 minutes, or until waffles are golden brown.
Remove waffles and place on wire rack to cool. Repeat with remaining batter.