I use rosin to make edibles all the time. In fact, it's all I use for edibles.
No straining or squeezing or messy afterbirth to discard. Just yummy rosin (which still tastes like shit). LOL
Here is what I do....
I take the rosin and put about a gram in a small Pyrex dish. I rig that dish so it sits tilted (so the tiny bit of rosin I'm using gathers in the corner) and I put it in the oven at 240F for 40 minutes.
When I take it out, I add about a half teaspoon of butter and a tiny sprinkle of sunflower lecithin and mix it in the hot Pyrex dish. The dish is still hot from being in the oven so the butter and lecithin mix really really well.
That's the basics.
I have high tolerance so I need almost an entire gram for a single dose. If you're tolerance is lower, use more butter or oil.
From there, sometimes I let it harden. I put some in caps. I use some for cooking. Whatever.
Sometimes I used coconut oil instead of butter (actually, usually).
I used to make a lot of stuff like brownies and cookies but I eventually found it to be much easier to just eat the butter/oil in caps or on toast, in my coffee, on my cereal, whatever.