i have 1male1female mouse for my two snakes. its worth it after you get the hang of it.

whatever your measurements are, half should be grains (i use cheerios)
and half dog kibble, they loove dog kibble. cheap brand is fine but momma needs lots of protein so make sure its got a a lot.

i usually throw in a peice of whatever im eating at the moment.

usually either
apple wedge (they never eat the whole piece but every mouse is different)
lettuce (always gone the next day)
3 sticks of baby carrots cut ( they'll eat 75% i'd say in one day)