How Caitlin Smith built Simple Mills into an $800M better-for-you brand

Executive overview

Caitlin Smith founded Simple Mills after switching to a whole-foods diet and realising how hard it was to find snacks made with clean, nutrient-dense ingredients. She started mixing almond flour–based baking mixes in her Atlanta apartment and sold her first product to a local Whole Foods buyer with nothing but a batch of muffins and a label printed at home.

Over twelve years, she built Simple Mills from a single-store pilot into a nationally recognised brand — raising under $10M total, staying capital-efficient, and selling to Flowers Foods for nearly $800M in 2025.

The mission never changed: make real food delicious enough that eating well becomes an easy choice.

From kitchen experiments to first retail shelf

• Diet change in early 20s — switched to whole foods, energy transformed; became motivated to help others do the same
• Started testing recipes at home: almond flour, coconut sugar, hemp seeds — ingredients that barely existed in grocery stores at the time
• Cold-called her nearest Whole Foods; the store buyer said "come Saturday" — she showed up with baked muffins
• Buyer was stunned that clean ingredients could taste that good; said yes on the spot
• First order: ~4–8 cases; sold through faster than expected and immediately ran short
• Self-funded early operations: sold her car, maxed credit cards, spent all savings on working capital
• Used 99designs for packaging; rigged her home printer with a bulk ink cartridge to keep costs down

Funding the brand

• Parents mortgaged their home to provide $200K after a family friend deal collapsed at the last minute
• Enrolled at Chicago Booth simultaneously; used coursework (entrepreneurial selling, accounting, New Venture Challenge) directly in the business
• Initial funding model was naive — pegged total capital need at $200K; large CPGs spend $50M+ on a single product line
• Realised the true capital requirement was working capital, not marketing: retailers don't pay on delivery
• Raised first round of just over $2M — lead investor discovered the brand by bumping into another interested investor in a Charlotte Whole Foods
• First three rounds were all angel investors; angels could take a more passionate, flexible view than sector-focused VCs
• After raising, asked that half the parent loan be repaid — couldn't tolerate family money being at risk
• In eight years, raised less than $10M total; no fancy offices, no inflated salaries

Building the team and product line

• Dropped out of Booth after year one once the first round closed
• Chicago was strategically valuable: proximity to CPG talent, affordable relative to coastal cities, strong consumer brand recruiting network
• Invested first capital in professional packaging design — "your number one marketing vehicle as a consumer brand"
• Hired junior staff first, then brought in experienced CPG operators to close knowledge gaps
• Product differentiation held through unconventional ingredients: almond flour crackers, watermelon seed flour cookies, butternut squash and red bean cheddar poppins
• Core positioning: ingredients that work hard for people, wrapped in taste consumers already love

Navigating disruption and competition

• As the better-for-you category crowded, Simple Mills held position through ingredient storytelling, not marketing spend
• COVID and supply chain disruption became a growth lever: maintained a 96% fill rate when competitors were at 80%
• Being in-stock when rivals weren't deepened retailer relationships and expanded shelf space
• Framework from The Art of Possibility: treat every disruption as a block of marble with a statue inside — look for the opportunity, not just the threat
• Culture built around moving through ambiguity; the team was trained to reframe problems, not just manage them

The decision to sell

• Mission was always maximum impact, not a financial target — "I could lose all my money and this would still be worth it"
• Flowers Foods offered distribution scale and innovation resources Simple Mills couldn't self-fund at pace
• Accelerated distribution into more stores; expanded innovation pipeline; reached a broader consumer base beyond the already-health-conscious
• Cultural alignment with Flowers CEO (known for five-plus years) was the deciding factor — "a wonderful fit in a way that a lot of times these things aren't"
• Post-acquisition role remained similar: setting vision, motivating the team — but with far more opportunity to assess and execute

On continuous growth as a founder

• Early advisor's warning: entrepreneurship is "one of the most downwardly mobile professions" — if you succeed, the job outgrows you
• The job demands constant learning at every stage; the version of you that built year one cannot run year ten
• Think of leadership skills as a growing toolbox — more tools, more conscious about which to deploy and when
• Applies to the whole team: the founder must invest in the growth of leaders at every level, not just their own