Cut the avocados in half, remove the pits, and scoop the flesh into a mixing bowl.
Cut the lime in half and squeeze the juice over the mashed avocados. Make sure to remove any seeds that may fall into the bowl.
Sprinkle the garlic powder and salt over the avocado mixture.
Use a fork or a potato masher to mash the avocados until you reach your desired consistency. For a smoother guacamole, mash thoroughly; for a chunkier texture, mash lightly.
Taste the guacamole and adjust the seasoning if needed. Add more lime juice, garlic powder, or salt to suit your preference.