Preheat your oven to 350°F (175°C) to warm those taco shells. Because nobody – and I mean nobody – deserves a cold, sad taco shell.
Heat olive oil in a large skillet over medium-high heat until it shimmers. Is your pan hot enough? Flick a tiny drop of water in – if it sizzles, you're good to go!
Add the ground beef and break it apart with a wooden spoon. Keep breaking it down until you have small, even crumbles. No beef boulders allowed in my tacos!
Cook the beef until no pink remains, about 5-7 minutes. Drain excess fat if you're being virtuous (or leave it if you're being delicious – I won't judge).
Sprinkle the taco seasoning over the meat and stir to coat evenly. Add water and stir again.
Bring the mixture to a simmer and cook for about 5 minutes until the liquid reduces and you have a thick, saucy beef mixture. The magic happens in this step – don't rush it!
While the beef simmers, warm your taco shells in the oven for 3-5 minutes. This makes them extra crispy and less likely to shatter on the first bite (we've all been there).
Prepare your toppings bar so everyone can customize their tacos. Because if there's one thing I've learned in life, it's that people get weirdly passionate about their taco toppings.
Assemble: Start with the beef, then pile on your preferred toppings. My pro tip? Cheese goes on first after the meat so it gets a little melty from the heat.