Dry vs Wet Measuring There's a reason why there are measuring devices designed for liquid and dry measurements but most likely not for the reason you think. Wet and dry measuring devices are exactly the same volume, the difference is in the design. Measuring cups and spoons for dry ingredients are engineered to be filled to the brim so the excess can be swept off easily for an exact measurement. Liquid measuring devices have brims so you don't have to worry about spilling. So, if you are in a pinch, you can use either measuring device.
I make croutons all the time now. I love to eat crusty La Brea brand bread but those tapered ends don't work well for sandwiches or even a piece of toast. So, I freeze the bread ends till I have enough to make crunchy, garlicky, herby, oily croutons. Stale or even fresh bread is fine too! I usually make too much and end up snacking on them cause they're so good!
Slice your bread into the size crouton you want. About an inch is the largest you want to go or they take too long to cook and are cumbersome to chew. Don't worry too much about the shape or size consistency. While evenly sized croutons cook more uniformly, I find the variance in size and crunch a welcomed inconsistency. Yeah, I know the top chefs preach consistency but sometimes you need to break the rules! Think rustic cooking.
Heat a large pan on medium heat. Add half the olive oil, wait a minute and add the bread. Immediately start mixing the bread so the oil is distributed as much as possible. Drizzle the remaining oil over the top and stir again. Add the rest of the ingredients including garlic powder, herbs, salt and pepper and continue to stir till every piece is visibly covered in herbs and pepper.
Let the croutons sit in the pan so they start to brown and then stir again. Repeat this process till you have a nice color on the croutons. Be careful not to leave them for too long or they could burn! Once they look good to the eye, transfer them to a preheated oven at 300 degrees and cook for twenty minutes. I just leave them in the same pan but if it's not oven safe then transfer them to a cookie sheet.
No need to wait till your significant other is home for dinner, just start popping them in your mouth. I eat them right out of the oven to test the crunchiness but honestly that's just an excuse to snack. Once they've cooled down I start dipping them in Caeser Dressing. Good thing my wife doesn't like croutons. More for me!