Shred cheddar cheese and place in <g class="gr_ gr_49 gr-alert gr_gramm gr_inline_cards gr_run_anim Grammar only-ins doubleReplace replaceWithoutSep" id="49" data-gr-id="49">saucepan</g> over low heat.
Add cream cheese and stir consistently.
Add mustard, beer and garlic powder and blend well.
Add scallions and move to a slow cooker if not already in one.
Top with chives.
Serve with bread pieces or pretzels.