This ended up being a little more than simple but it still is clean!
The base card is kraft card stock.
The next layer is from a corrugated, kraft, card stock pack.
On another piece of kraft card stock I stamped the squirrel fire and other images, from Lawn Fawn’s “Love You S’More” set and colored them with Faber Castell PITT pens, and trimmed them out with scissors.
On black car stock I stamped the sentiment using Versamark ink and heat embossed it with white embossing powder.
All these I applied to the kraft rectangle on the card front.