Preheat the oven to 425 F (215 C). Cut a piece of parchment paper to fit the baking tray and set aside. Place the baking tray in the oven without the parchment paper to heat it.
Combine the plant milk, apple cider vinegar, and mustard in a small bowl. Set aside.
Mix the flour, almond flour, baking powder, baking soda, salt, and nutritional yeast in a medium bowl. Stir to combine the ingredients.
Add the diced jalapenos to the dry ingredients and toss to mix.
Pour the wet ingredients into the flour mixture. Stir to combine until all the flour is dry.
Remove the heated baking tray from the oven and carefully place the parchment paper on it.
Scoop about ½ cup of the biscuit mixture and drop it onto the baking tray. Run a knife around the sides of the measuring cup so the biscuit slides out easily. Repeat until you have 8-10 biscuits.
Press 2-3 jalapeno slices into each biscuit.
Place the biscuits on the middle rack of the oven and bake for 9-12 minutes until they are brown and firm.
Remove the biscuits from the tray and place them on a wire cooling rack. Enjoy!