We use a TF6, 5-cup, Mr. Coffee coffee maker in our TT. Less than $20 at Walmart. It's rated at 600 watts. Our 600 watt PSW inverter along with the TF6 makes some awesome coffee every morning!
BFL13 brings up a good point about using shorter/fatter wires/cables. Very difficult to get the rated/maximum output out of any inverter unless you have a quality connection to the battery. Our 600 watt inverter is drawing 45-50 amps when we're running that coffee maker. Pretty hard to get that kind of amperage through a pair of dinky wires & alligator clips--lol!