Cut the bread into bite-sized pieces. I cut mine into 1" cubes. Transfer to two large baking sheets and bake for 8 or so minutes or until golden brown but NOT crunchy. You're more after color than doneness at this point. Remove and let cool.
Place butter in a microwave-safe bowl. Microwave for 30 seconds or more until the butter is just soft but NOT melted. You want it to be the consistency of mayonnaise.
Add the garlic and seasoning to the butter and mix well.
Transfer half of the butter mixture to a large bowl and add half of the bread cubes. Stir gently with a spatula or large spoon to coat well. Transfer the coated cubes back to a baking sheet. Repeat with the other half of the butter mixture and bread cubes.
Bake cubes another 10-20 minutes or until the croutons have the desired doneness, stirring every few minutes. For me this was about 10 minutes. I like my croutons to be crunchy on the outside and a little soft on the inside.
Remove from the oven and cool before serving.
Notes
You can substitute thick white bread or French bread for the Texas toast.