bada bing / bada boom

Reader's Digest 5月号の 'The Food on your Plate' は 'Butter' が主人公で、その記事からの引用です。
I'm from the cream skimmed off milk. Does it get any better than that? Cream contain tiny fat globules that float around ignoring one another. Yet when you shake, beat, or churn them enough, amazing things start to happen. First you incorporate air, whisking up whipped cream; churn longer and the sticking together until blobs of golden dairy fat are floating in watery milk--buttermilk. Drain it, wash the milk fat with water, give it a knead or two, add some salt (or don't), and bada bing, bada boom: me!
"bada bing" と "bada boom" は同じ事を意味しているようで、"voila" の様な間投詞を連想させます。辞書で意味を確認します。
・Oxford English Dictionary: Used to emphasize that something will happen effortlessly and predictably.: Slip on these exotic sandals and bada-bing you're looking fabulous.

・Wiktionary: To express that something was easily completed, simple to accomplish, or followed as a direct consequence.: That's how i work. a little slice of life here, a little piece of a different song there, and bada bing, bada boom, mix it all together and there it is.

・Merriam-Webster's Online Dictionary: used especially to emphasize something regarded as surprising, sudden, effortlessly achieved, or impressive: This was all it really took? A mass, a prayer and bada bing! Absolution?
・Urban Dictionary: Expression used to signify the end of a process or chain of events thought to be difficult but actually easy.: Put the bonnet back down, bada bing it's finished!
Reader's Digestの記事の様に "bada bing, bada boom" とする他に、"bada bing" と "bada boom" をそれぞれ単独に使用したり、"bada-bing" / "bada-boom" の様にハイフンを使う表記もありました。