It's raining outside, and I'm going to frycook a couple of pancakes from now. It's raining outside and I'm going to cook a couple of pancakes now.

The "and" here feels weird to me; we usually say "cook" or "make" for pancakes.

It's raining outside, and I'm going to frymake a couple of pancakes fromright now. It's raining outside, and I'm going to make a couple of pancakes right now.

Fry is not grammatically wrong but we don’t really use it for pancakes (we usually use it for eggs)

It's raining outside, and I'm going to frymake a couple of pancakes from now. It's raining outside and I'm going to make a couple of pancakes.

It's raining outside, and I'm going to fry a couple of pancakes from nowafter this. It's raining outside, and I'm going to fry a couple of pancakes after this.

これから is a difficult phrase to translate into English. It doesn literally mean "from now (on)," but the times when you would say this in Japanese are not always when you would say it in English. I think "after this" or maybe even "soon" is a good translation here.

I have a buttermilk pancake mix, so I'll use it. I have a buttermilk pancake mix, so I'll use it.

Is it the Morinaga one? I think I might say "so I'll be using that"

I have a/some buttermilk pancake mix, so (I think) I'll use it. I have a/some buttermilk pancake mix, so (I think) I'll use it.

I'm not actually sure if "some buttermilk pancake mix" is grammatically correct, but it feels more natural. Alternatively, you could say, "a box/package/etc. of buttermilk pancake mix."

This mix makes nice and, glutenous pancakes. This mix makes nice, glutenous pancakes.

nice and (word) sounds like emphasis.

This mix makes nice and gflutenousffy pancakes. This mix makes nice and fluffy pancakes.

Or bouncy? Springy? Firm? It’s just that glutenous is not used in this way.

This mix makes nice and, glutenous pancakes. This mix makes nice, glutenous pancakes.

I'll add some cinnamon and erythritolsweetener. I'll add some cinnamon and sweetener.

Erythritol is not wrong but it’s a bit too technical

I dwon't add any eggs because I have only a few eggs left. I won't add any eggs because I have only a few left.

a few is good because we know it's eggs already

I dwon't add any eggs because I have only a few eggs left. I won't add any eggs because I have only a few eggs left.

I don'will not add any eggs because I only have onlya few eggs left. I will not add any eggs because I only have a few eggs left.

I dwon't add any eggs because I only have onlya few eggs left. I won't add any eggs because I only have a few eggs left.

But, I know they will be very good. But, I know they will be very good.

But I know they will be very good. I know they will be very good.