Well, you could probably use an ImageLabel or ImageButton, so long as the image has a transparent background and the shadow effect you’re looking at.
I don’t know what Bloxburg and Jailbreak use, unfortunately.
You could do this by placing one text label inside the other, setting its size to (1,0,1,0) and position to (0.5,0,0.5,0) and its anchorpoint to (0.5,0.5)
This effectively clones the parent textlabels size, etc. I’d put this all in a separate frame just to use as a bounding box for other elements.
Next, to create the effect just change the position of the child text label, use offset. Note: the parent textlabel should be colored as the “shadow” and the child will be your foreground text.