Gather all your ingredients. Having everything at hand makes the cooking process smoother and more enjoyable.
Preheat your oven to 425 degrees Fahrenheit. This ensures that the cauliflower roasts beautifully, resulting in a crispy texture.
Line a baking pan with parchment paper. This prevents sticking and makes cleanup a breeze.
In a large bowl, toss the cauliflower florets with a little oil, or opt for an oil spray if you prefer. This step is crucial as it helps the seasonings adhere and gives a nice roasted flavor.
In a separate bowl or a zip-lock bag, combine the onion powder and flour. Toss the oiled cauliflower in this mixture until well coated.
Add the milk to the bowl with the florets, mixing until they are evenly coated. This will help the breadcrumbs to stick better if you choose to use them.
If you’re using breadcrumbs, add them next and toss to ensure each piece is coated. The breadcrumbs will give a delicious crunch to the tacos.
Arrange the coated cauliflower florets in a single layer on the prepared baking pan. Make sure not to crowd them, as this will affect the roasting.
Bake the cauliflower for 25 minutes, or until golden and crispy. Keep an eye on them to prevent burning.
While the cauliflower is roasting, combine the barbecue sauce with the oil or butter in a small bowl. This mixture will help adhere the sauce to the roasted florets.
After 25 minutes, take the pan out and dip each roasted cauliflower piece into the sauce. Make sure they're well coated.
Return the coated florets to the oven and bake for an additional 15 minutes. This allows the sauce to caramelize and infuse flavor.
If you like a little extra crispiness, broil for an additional 5 minutes, but watch them carefully to prevent burning.
Once cooked, divide the roasted cauliflower among the taco shells, lettuce cups, or tortillas. Top with your favorite toppings.
Serve hot and enjoy your delicious Cauliflower Tacos!