1 Layer of Cauldron Lava + Blue Ice = Basalt

So what would be a fun, easy, and satisfying way to get basalt is by using a cauldron. How this would function is when you would put one block of blue ice in a cauldron filled with lava. You then get one block of basalt and one layer of lava will vanish from the cauldron. This can help layering lava cauldrons and receiving material more easily.

For the people who will call me out on this, I know that blue ice doesn't turn into basalt when it touches lava. What actually happens in the cauldron is that the blue ice converts the lava into basalt while it melts away.