Thanks!

If you try another type, try rolled oats first, not steel cut. Then if that works well you could think about trying steel cut. Your standard Quaker Oats are rolled oats (Quaker also sells quick oats).

Steel cut oats are the least processed, are chunkier, and require the most cooking. Rolled oats are flattened and steamed, so require less cooking than steel cut. Quick oats are processed even more and require the least cooking. So if you try rolled, you will probably get a little bit heartier/crunchier of a topping. Steel cut might end up being just straight hard or overly chewy.

OP, are you using rolled oats or another type? Rolled oats (vs steel cut oats or quick oats) sounds like the right type, but I thought I should ask.