--- title: What's Backpropagation? - Mathematical Intuition | daily.dev description: A beginner-friendly explanation of backpropagation using a peanut butter sandwich analogy. The forward pass is making the sandwich, the loss is the friend's... canonical: https://daily.dev/posts/what-s-backpropagation---mathematical-intuition-ouevmwllv twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: What's Backpropagation? - Mathematical Intuition | daily.dev og:description: A beginner-friendly explanation of backpropagation using a peanut butter sandwich analogy. The forward pass is making the sandwich, the loss is the friend's... og:url: https://daily.dev/posts/what-s-backpropagation---mathematical-intuition-ouevmwllv og:image: https://api.daily.dev/og/posts/OueVMWllV.png og:image:alt: What's Backpropagation? - Mathematical Intuition og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # What's Backpropagation? - Mathematical Intuition **[Medium](https://daily.dev/sources/medium_js)** · 1 min read · 0 upvotes · 0 comments ## Summary A beginner-friendly explanation of backpropagation using a peanut butter sandwich analogy. The forward pass is making the sandwich, the loss is the friend's feedback, backpropagation is tracing back through each step to find the cause of the error, and updating weights is adjusting the recipe. The process repeats until the output is correct. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Backpropagation Explained for Beginners \(Part 1\): Building the Intuition](https://daily.dev/posts/backpropagation-explained-for-beginners-part-1-building-the-intuition-219g21wnz) · Towards Data Science · 0 upvotes · 0 comments - [Backpropagation: How a Neural Network Learns From Its Mistakes](https://daily.dev/posts/backpropagation-how-a-neural-network-learns-from-its-mistakes-byraqzxku) · Medium · 0 upvotes · 0 comments - [Backpropagation Explained for Beginners \(Part 3\): How Backpropagation Really Works](https://daily.dev/posts/backpropagation-explained-for-beginners-part-3-how-backpropagation-really-works-epjfnxkab) · Towards Data Science · 0 upvotes · 0 comments - [Backpropagation Explained for Beginners \(Part 2\): There Has to Be a Better Way](https://daily.dev/posts/backpropagation-explained-for-beginners-part-2-there-has-to-be-a-better-way-nh7wdzpsa) · Towards Data Science · 0 upvotes · 0 comments --- Tags: [#machine-learning](https://daily.dev/tags/machine-learning), [#deep-learning](https://daily.dev/tags/deep-learning), [#neural-networks](https://daily.dev/tags/neural-networks) [View this post on daily.dev](https://daily.dev/posts/what-s-backpropagation---mathematical-intuition-ouevmwllv) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"What's Backpropagation? - Mathematical Intuition","url":"https://daily.dev/posts/what-s-backpropagation---mathematical-intuition-ouevmwllv","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/what-s-backpropagation---mathematical-intuition-ouevmwllv"},"datePublished":"2026-07-17T16:31:35.424Z","dateModified":"2026-07-17T16:33:37.337Z","description":"A beginner-friendly explanation of backpropagation using a peanut butter sandwich analogy. 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