How to increase calories to my homemade gainer smoothie?

Hey folks, I’m looking to gain weight and need to add more calories to the two smoothies I have every day (one in the morning and one in the evening). Unfortunately, I have a few dietary restrictions due to food sensitivities and allergies causing my gut to react. I CANNOT have the following:

\- Diary
\- Gluten
\- Oats
\- Artificial sweeteners

My current homemade gainer smoothie:

\- 2 cups of almond milk
\- 2 cup of water
\- 1 cup of blueberries
\- 1/2 a banana
\- 2 Tablespoons of honey
\- 1 Tablespoon olive oil
\- 1 scoop of unflavoured protein powder
\- **3/4 cup of raw white rice flour(!?!)**

This seemed like a decent gluten and dairy free homemade gainer/protein smoothie. According to the Cronometer app this smoothie is about 940 calories with about 440 of that being from the rice flour.

However, I now realized I was being incredibly dumb and raw rice flour is not safe to consume. I was adding rice flour as a replacement to the oats that most homemade smoothie recipes call for because my digestive tract treats oats (even gluten free oats) as though I’ve consumed gluten and I get a bad gut reaction. Luckily, I’ve only been doing this for 3 days and I have not given myself food poisoning as of yet. I’ll be stopping this immediately.

I did however, actually like the added starch because it made my poops more solid (my diet typically has a ton of fibre). So what can I add to my smoothie recipe in replace of the rice flour that would be about 400-500 calories? I’m looking for suggestions that aren’t just the obvious 4 Tablespoons of peanut butter because for my daily breakfast I already have two pieces of toast with peanut butter and jam along with two eggs. I also liked the solid poops (sorry if that’s too much info haha)! I know I could just bake the rice flour until it’s food safe, but I gather Reddit may have some better ideas. Thank you kindly for your time and suggestions!