honest-to-goodness
From Longman Dictionary of Contemporary Englishhonest-to-goodnessˌhonest-to-ˈgoodness adjective [only before noun] SIMPLE/PLAINsimple and good plain honest-to-goodness home cookingExamples from the Corpushonest-to-goodness• They specialize in honest-to-goodness homemade desserts.• Smile - a real honest-to-goodness ordinary, human smile.