Place almonds in a dry skillet. Don't add any oil.
Heat over medium to medium-low heat.
Move the almonds around every few seconds. Just slide the pan around and give it a little shake to flip the almonds or use a heat-proof silicone spatula. Once the pan is warm, this takes just 1-2 minutes.
As soon as the almonds are brown, remove them from the pan onto a plate.
Oven Method
Place almonds on a baking sheet. I like to use parchment because it makes removing the almonds easy.
Put baking sheet in a preheated 350° oven for 6-10 minutes, flipping halfway through cooking.
Once the almonds are brown, remove them from the oven and place almonds on a clean plate
Notes
Toast similar pieces together. Sliced and slivered almonds can brown at different rates, so toast them separately.
Avoid overcrowding. Keep the almonds in a single layer. Use batches on the stovetop if needed.
Stay nearby. Almonds brown quickly once they start to toast.
Check both color and aroma. Look for a light golden color and a nutty smell rather than relying only on the timer.
Cool before tasting for crunch. Warm almonds may seem slightly soft. They become crisper as they cool.