In a big Thasta Tupperware sized bowl break up thawed casava and mix with coconut milk. Mix in butter and macapuno, continuously stirring and breaking up the casava. Lastly add sweetened condensed milk and stir until everything is mixed well. There will be some lumps but as long as there are no major lumps it will be fine. pour into ungreased caserole dish and bake 45 mins before serving @ 350.